diff --git a/github/AuthenticatedUser.py b/github/AuthenticatedUser.py
index e035f9a1..d403893f 100644
--- a/github/AuthenticatedUser.py
+++ b/github/AuthenticatedUser.py
@@ -258,6 +258,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "POST",
             "/user/emails",
             None,
+            None,
             post_parameters
         )
 
@@ -272,6 +273,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "PUT",
             "/user/following/" + following._identity,
             None,
+            None,
             None
         )
 
@@ -286,6 +288,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "PUT",
             "/user/starred/" + starred._identity,
             None,
+            None,
             None
         )
 
@@ -300,6 +303,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "PUT",
             "/user/subscriptions/" + subscription._identity,
             None,
+            None,
             None
         )
 
@@ -314,6 +318,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "PUT",
             "/user/watched/" + watched._identity,
             None,
+            None,
             None
         )
 
@@ -347,6 +352,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "POST",
             "/authorizations",
             None,
+            None,
             post_parameters
         )
         return github.Authorization.Authorization(self._requester, headers, data, completed=True)
@@ -362,6 +368,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "POST",
             "/repos/" + repo.owner.login + "/" + repo.name + "/forks",
             None,
+            None,
             None
         )
         return github.Repository.Repository(self._requester, headers, data, completed=True)
@@ -387,6 +394,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "POST",
             "/gists",
             None,
+            None,
             post_parameters
         )
         return github.Gist.Gist(self._requester, headers, data, completed=True)
@@ -408,6 +416,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "POST",
             "/user/keys",
             None,
+            None,
             post_parameters
         )
         return github.UserKey.UserKey(self._requester, headers, data, completed=True)
@@ -458,6 +467,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "POST",
             "/user/repos",
             None,
+            None,
             post_parameters
         )
         return github.Repository.Repository(self._requester, headers, data, completed=True)
@@ -500,6 +510,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "PATCH",
             "/user",
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
@@ -515,6 +526,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/authorizations/" + str(id),
             None,
+            None,
             None
         )
         return github.Authorization.Authorization(self._requester, headers, data, completed=True)
@@ -540,6 +552,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/user/emails",
             None,
+            None,
             None
         )
         return data
@@ -679,6 +692,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/user/keys/" + str(id),
             None,
+            None,
             None
         )
         return github.UserKey.UserKey(self._requester, headers, data, completed=True)
@@ -706,6 +720,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/notifications/threads/" + id,
             None,
+            None,
             None
         )
         return github.Notification.Notification(self._requester, headers, data, completed=True)
@@ -770,6 +785,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/repos/" + self.login + "/" + name,
             None,
+            None,
             None
         )
         return github.Repository.Repository(self._requester, headers, data, completed=True)
@@ -858,6 +874,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/user/following/" + following._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -873,6 +890,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/user/starred/" + starred._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -888,6 +906,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/user/subscriptions/" + subscription._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -903,6 +922,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/user/watched/" + watched._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -919,6 +939,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "DELETE",
             "/user/emails",
             None,
+            None,
             post_parameters
         )
 
@@ -933,6 +954,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "DELETE",
             "/user/following/" + following._identity,
             None,
+            None,
             None
         )
 
@@ -947,6 +969,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "DELETE",
             "/user/starred/" + starred._identity,
             None,
+            None,
             None
         )
 
@@ -961,6 +984,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "DELETE",
             "/user/subscriptions/" + subscription._identity,
             None,
+            None,
             None
         )
 
@@ -975,6 +999,7 @@ class AuthenticatedUser(github.GithubObject.CompletableGithubObject):
             "DELETE",
             "/user/watched/" + watched._identity,
             None,
+            None,
             None
         )
 
diff --git a/github/Authorization.py b/github/Authorization.py
index 2289fd34..f287a2b6 100644
--- a/github/Authorization.py
+++ b/github/Authorization.py
@@ -115,6 +115,7 @@ class Authorization(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -148,6 +149,7 @@ class Authorization(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/Commit.py b/github/Commit.py
index 5e909213..ad744e39 100644
--- a/github/Commit.py
+++ b/github/Commit.py
@@ -131,6 +131,7 @@ class Commit(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/comments",
             None,
+            None,
             post_parameters
         )
         return github.CommitComment.CommitComment(self._requester, headers, data, completed=True)
@@ -157,6 +158,7 @@ class Commit(github.GithubObject.CompletableGithubObject):
             "POST",
             self._parentUrl(self._parentUrl(self.url)) + "/statuses/" + self.sha,
             None,
+            None,
             post_parameters
         )
         return github.CommitStatus.CommitStatus(self._requester, headers, data, completed=True)
diff --git a/github/CommitComment.py b/github/CommitComment.py
index 55c2cf86..061737bf 100644
--- a/github/CommitComment.py
+++ b/github/CommitComment.py
@@ -131,6 +131,7 @@ class CommitComment(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -148,6 +149,7 @@ class CommitComment(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/Download.py b/github/Download.py
index 86b7ae44..a4b3b656 100644
--- a/github/Download.py
+++ b/github/Download.py
@@ -201,6 +201,7 @@ class Download(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
diff --git a/github/Gist.py b/github/Gist.py
index a1497685..de4ded9e 100644
--- a/github/Gist.py
+++ b/github/Gist.py
@@ -173,6 +173,7 @@ class Gist(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/comments",
             None,
+            None,
             post_parameters
         )
         return github.GistComment.GistComment(self._requester, headers, data, completed=True)
@@ -186,6 +187,7 @@ class Gist(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/forks",
             None,
+            None,
             None
         )
         return Gist(self._requester, headers, data, completed=True)
@@ -199,6 +201,7 @@ class Gist(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -220,6 +223,7 @@ class Gist(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
@@ -235,6 +239,7 @@ class Gist(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/comments/" + str(id),
             None,
+            None,
             None
         )
         return github.GistComment.GistComment(self._requester, headers, data, completed=True)
@@ -260,6 +265,7 @@ class Gist(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/star",
             None,
+            None,
             None
         )
         return status == 204
@@ -273,6 +279,7 @@ class Gist(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url + "/star",
             None,
+            None,
             None
         )
 
@@ -285,6 +292,7 @@ class Gist(github.GithubObject.CompletableGithubObject):
             "PUT",
             self.url + "/star",
             None,
+            None,
             None
         )
 
diff --git a/github/GistComment.py b/github/GistComment.py
index 6c7e2461..f0b5c80c 100644
--- a/github/GistComment.py
+++ b/github/GistComment.py
@@ -91,6 +91,7 @@ class GistComment(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -108,6 +109,7 @@ class GistComment(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/GitRef.py b/github/GitRef.py
index a666156b..84ec00c5 100644
--- a/github/GitRef.py
+++ b/github/GitRef.py
@@ -67,6 +67,7 @@ class GitRef(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -88,6 +89,7 @@ class GitRef(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/GithubObject.py b/github/GithubObject.py
index bc32b257..4fddd29d 100644
--- a/github/GithubObject.py
+++ b/github/GithubObject.py
@@ -148,6 +148,7 @@ class GithubObject(object):
         status, responseHeaders, output = self._requester.requestJson(
             "GET",
             self._url,
+            None,
             conditionalRequestHeader,
             None
         )
@@ -183,6 +184,7 @@ class CompletableGithubObject(GithubObject):
             "GET",
             self._url,
             None,
+            None,
             None
         )
         self._storeAndUseAttributes(headers, data)
diff --git a/github/Hook.py b/github/Hook.py
index 721bdd7a..ea0be67b 100644
--- a/github/Hook.py
+++ b/github/Hook.py
@@ -115,6 +115,7 @@ class Hook(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -151,6 +152,7 @@ class Hook(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
@@ -164,6 +166,7 @@ class Hook(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/tests",
             None,
+            None,
             None
         )
 
diff --git a/github/Issue.py b/github/Issue.py
index 1cdcc6bb..260967d3 100644
--- a/github/Issue.py
+++ b/github/Issue.py
@@ -204,6 +204,7 @@ class Issue(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/labels",
             None,
+            None,
             post_parameters
         )
 
@@ -221,6 +222,7 @@ class Issue(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/comments",
             None,
+            None,
             post_parameters
         )
         return github.IssueComment.IssueComment(self._requester, headers, data, completed=True)
@@ -234,6 +236,7 @@ class Issue(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url + "/labels",
             None,
+            None,
             None
         )
 
@@ -271,6 +274,7 @@ class Issue(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
@@ -286,6 +290,7 @@ class Issue(github.GithubObject.CompletableGithubObject):
             "GET",
             self._parentUrl(self.url) + "/comments/" + str(id),
             None,
+            None,
             None
         )
         return github.IssueComment.IssueComment(self._requester, headers, data, completed=True)
@@ -337,6 +342,7 @@ class Issue(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url + "/labels/" + label._identity,
             None,
+            None,
             None
         )
 
@@ -352,6 +358,7 @@ class Issue(github.GithubObject.CompletableGithubObject):
             "PUT",
             self.url + "/labels",
             None,
+            None,
             post_parameters
         )
 
diff --git a/github/IssueComment.py b/github/IssueComment.py
index 5a3c62da..c1af97f8 100644
--- a/github/IssueComment.py
+++ b/github/IssueComment.py
@@ -100,6 +100,7 @@ class IssueComment(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -117,6 +118,7 @@ class IssueComment(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/Label.py b/github/Label.py
index b3c75501..b961af18 100644
--- a/github/Label.py
+++ b/github/Label.py
@@ -68,6 +68,7 @@ class Label(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -88,6 +89,7 @@ class Label(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/Legacy.py b/github/Legacy.py
index 1ed760e2..a0e3493f 100644
--- a/github/Legacy.py
+++ b/github/Legacy.py
@@ -59,6 +59,7 @@ class PaginatedList(github.PaginatedList.PaginatedListBase):
             "GET",
             self.__url,
             args,
+            None,
             None
         )
         self.__continue = len(data[self.__key]) > 0
diff --git a/github/MainClass.py b/github/MainClass.py
index ae1f612f..4eab8517 100644
--- a/github/MainClass.py
+++ b/github/MainClass.py
@@ -106,6 +106,7 @@ class Github(object):
                 'GET',
                 '/rate_limit',
                 None,
+                None,
                 None
             )
         return self.__requester.rate_limiting
@@ -121,6 +122,7 @@ class Github(object):
                 'GET',
                 '/rate_limit',
                 None,
+                None,
                 None
             )
         return self.__requester.rate_limiting_resettime
@@ -146,6 +148,7 @@ class Github(object):
                 "GET",
                 "/users/" + login,
                 None,
+                None,
                 None
             )
             return github.NamedUser.NamedUser(self.__requester, headers, data, completed=True)
@@ -178,6 +181,7 @@ class Github(object):
             "GET",
             "/orgs/" + login,
             None,
+            None,
             None
         )
         return github.Organization.Organization(self.__requester, headers, data, completed=True)
@@ -192,6 +196,7 @@ class Github(object):
             "GET",
             "/repos/" + full_name,
             None,
+            None,
             None
         )
         return Repository.Repository(self.__requester, headers, data, completed=True)
@@ -224,6 +229,7 @@ class Github(object):
             "GET",
             "/gists/" + id,
             None,
+            None,
             None
         )
         return github.Gist.Gist(self.__requester, headers, data, completed=True)
@@ -286,6 +292,7 @@ class Github(object):
             "GET",
             "/legacy/user/email/" + email,
             None,
+            None,
             None
         )
         return github.NamedUser.NamedUser(self.__requester, headers, Legacy.convertUser(data["user"]), completed=False)
@@ -309,6 +316,7 @@ class Github(object):
             "POST",
             "/markdown",
             None,
+            None,
             post_parameters
         )
         return data
@@ -322,6 +330,7 @@ class Github(object):
             "GET",
             "/hooks",
             None,
+            None,
             None
         )
         return [HookDescription.HookDescription(self.__requester, headers, attributes, completed=True) for attributes in data]
@@ -335,6 +344,7 @@ class Github(object):
             "GET",
             "/gitignore/templates",
             None,
+            None,
             None
         )
         return data
@@ -349,6 +359,7 @@ class Github(object):
             "GET",
             "/gitignore/templates/" + name,
             None,
+            None,
             None
         )
         return GitignoreTemplate.GitignoreTemplate(self.__requester, headers, attributes, completed=True)
diff --git a/github/Milestone.py b/github/Milestone.py
index db38437f..0f23eb78 100644
--- a/github/Milestone.py
+++ b/github/Milestone.py
@@ -136,6 +136,7 @@ class Milestone(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -165,6 +166,7 @@ class Milestone(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/NamedUser.py b/github/NamedUser.py
index ca29d38e..435b1bf2 100644
--- a/github/NamedUser.py
+++ b/github/NamedUser.py
@@ -270,6 +270,7 @@ class NamedUser(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/gists",
             None,
+            None,
             post_parameters
         )
         return github.Gist.Gist(self._requester, headers, data, completed=True)
@@ -393,6 +394,7 @@ class NamedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             "/repos/" + self.login + "/" + name,
             None,
+            None,
             None
         )
         return github.Repository.Repository(self._requester, headers, data, completed=True)
@@ -461,6 +463,7 @@ class NamedUser(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/following/" + following._identity,
             None,
+            None,
             None
         )
         return status == 204
diff --git a/github/Organization.py b/github/Organization.py
index d252a054..aa904fce 100644
--- a/github/Organization.py
+++ b/github/Organization.py
@@ -246,6 +246,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "PUT",
             self.url + "/public_members/" + public_member._identity,
             None,
+            None,
             None
         )
 
@@ -263,6 +264,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "POST",
             "/repos/" + repo.owner.login + "/" + repo.name + "/forks",
             url_parameters,
+            None,
             None
         )
         return github.Repository.Repository(self._requester, headers, data, completed=True)
@@ -317,6 +319,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/repos",
             None,
+            None,
             post_parameters
         )
         return github.Repository.Repository(self._requester, headers, data, completed=True)
@@ -343,6 +346,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/teams",
             None,
+            None,
             post_parameters
         )
         return github.Team.Team(self._requester, headers, data, completed=True)
@@ -381,6 +385,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
@@ -470,6 +475,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "GET",
             "/repos/" + self.login + "/" + name,
             None,
+            None,
             None
         )
         return github.Repository.Repository(self._requester, headers, data, completed=True)
@@ -502,6 +508,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "GET",
             "/teams/" + str(id),
             None,
+            None,
             None
         )
         return github.Team.Team(self._requester, headers, data, completed=True)
@@ -529,6 +536,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/members/" + member._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -544,6 +552,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/public_members/" + public_member._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -559,6 +568,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url + "/members/" + member._identity,
             None,
+            None,
             None
         )
 
@@ -573,6 +583,7 @@ class Organization(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url + "/public_members/" + public_member._identity,
             None,
+            None,
             None
         )
 
diff --git a/github/PaginatedList.py b/github/PaginatedList.py
index e450dfd8..45b2546d 100644
--- a/github/PaginatedList.py
+++ b/github/PaginatedList.py
@@ -119,7 +119,13 @@ class PaginatedList(PaginatedListBase):
         self._reversed = False
 
     def _getLastPageUrl(self):
-        headers, data = self.__requester.requestJsonAndCheck("GET", self.__firstUrl, self.__nextParams, None)
+        headers, data = self.__requester.requestJsonAndCheck(
+            "GET",
+            self.__firstUrl,
+            self.__nextParams,
+            None,
+            None
+        )
         links = self.__parseLinkHeader(headers)
         lastUrl = links.get("last")
         return lastUrl
@@ -140,7 +146,13 @@ class PaginatedList(PaginatedListBase):
         return self.__nextUrl is not None
 
     def _fetchNextPage(self):
-        headers, data = self.__requester.requestJsonAndCheck("GET", self.__nextUrl, self.__nextParams, None)
+        headers, data = self.__requester.requestJsonAndCheck(
+            "GET",
+            self.__nextUrl,
+            self.__nextParams,
+            None,
+            None
+        )
 
         self.__nextUrl = None
         if len(data) > 0:
@@ -177,7 +189,13 @@ class PaginatedList(PaginatedListBase):
             params["page"] = page + 1
         if self.__requester.per_page != 30:
             params["per_page"] = self.__requester.per_page
-        headers, data = self.__requester.requestJsonAndCheck("GET", self.__firstUrl, params, None)
+        headers, data = self.__requester.requestJsonAndCheck(
+            "GET",
+            self.__firstUrl,
+            params,
+            None,
+            None
+        )
 
         return [
             self.__contentClass(self.__requester, headers, element, completed=False)
diff --git a/github/PullRequest.py b/github/PullRequest.py
index 8ea72e55..2b9b022b 100644
--- a/github/PullRequest.py
+++ b/github/PullRequest.py
@@ -293,6 +293,7 @@ class PullRequest(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/comments",
             None,
+            None,
             post_parameters
         )
         return github.PullRequestComment.PullRequestComment(self._requester, headers, data, completed=True)
@@ -311,6 +312,7 @@ class PullRequest(github.GithubObject.CompletableGithubObject):
             "POST",
             self._parentUrl(self._parentUrl(self.url)) + "/issues/" + str(self.number) + "/comments",
             None,
+            None,
             post_parameters
         )
         return github.IssueComment.IssueComment(self._requester, headers, data, completed=True)
@@ -337,6 +339,7 @@ class PullRequest(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
@@ -360,6 +363,7 @@ class PullRequest(github.GithubObject.CompletableGithubObject):
             "GET",
             self._parentUrl(self.url) + "/comments/" + str(id),
             None,
+            None,
             None
         )
         return github.PullRequestComment.PullRequestComment(self._requester, headers, data, completed=True)
@@ -418,6 +422,7 @@ class PullRequest(github.GithubObject.CompletableGithubObject):
             "GET",
             self._parentUrl(self._parentUrl(self.url)) + "/issues/comments/" + str(id),
             None,
+            None,
             None
         )
         return github.IssueComment.IssueComment(self._requester, headers, data, completed=True)
@@ -443,6 +448,7 @@ class PullRequest(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/merge",
             None,
+            None,
             None
         )
         return status == 204
@@ -461,6 +467,7 @@ class PullRequest(github.GithubObject.CompletableGithubObject):
             "PUT",
             self.url + "/merge",
             None,
+            None,
             post_parameters
         )
         return github.PullRequestMergeStatus.PullRequestMergeStatus(self._requester, headers, data, completed=True)
diff --git a/github/PullRequestComment.py b/github/PullRequestComment.py
index efc520cf..4d250d56 100644
--- a/github/PullRequestComment.py
+++ b/github/PullRequestComment.py
@@ -141,6 +141,7 @@ class PullRequestComment(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -158,6 +159,7 @@ class PullRequestComment(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/Repository.py b/github/Repository.py
index ed5934d5..9a62e13d 100644
--- a/github/Repository.py
+++ b/github/Repository.py
@@ -319,6 +319,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "PUT",
             self.url + "/collaborators/" + collaborator._identity,
             None,
+            None,
             None
         )
 
@@ -335,6 +336,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/compare/" + base + "..." + head,
             None,
+            None,
             None
         )
         return github.Comparison.Comparison(self._requester, headers, data, completed=True)
@@ -364,6 +366,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/downloads",
             None,
+            None,
             post_parameters
         )
         return github.Download.Download(self._requester, headers, data, completed=True)
@@ -385,6 +388,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/git/blobs",
             None,
+            None,
             post_parameters
         )
         return github.GitBlob.GitBlob(self._requester, headers, data, completed=True)
@@ -417,6 +421,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/git/commits",
             None,
+            None,
             post_parameters
         )
         return github.GitCommit.GitCommit(self._requester, headers, data, completed=True)
@@ -438,6 +443,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/git/refs",
             None,
+            None,
             post_parameters
         )
         return github.GitRef.GitRef(self._requester, headers, data, completed=True)
@@ -469,6 +475,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/git/tags",
             None,
+            None,
             post_parameters
         )
         return github.GitTag.GitTag(self._requester, headers, data, completed=True)
@@ -491,6 +498,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/git/trees",
             None,
+            None,
             post_parameters
         )
         return github.GitTree.GitTree(self._requester, headers, data, completed=True)
@@ -520,6 +528,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/hooks",
             None,
+            None,
             post_parameters
         )
         return github.Hook.Hook(self._requester, headers, data, completed=True)
@@ -554,6 +563,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/issues",
             None,
+            None,
             post_parameters
         )
         return github.Issue.Issue(self._requester, headers, data, completed=True)
@@ -575,6 +585,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/keys",
             None,
+            None,
             post_parameters
         )
         return github.RepositoryKey.RepositoryKey(self._requester, headers, data, completed=True, repoUrl=self._url)
@@ -596,6 +607,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/labels",
             None,
+            None,
             post_parameters
         )
         return github.Label.Label(self._requester, headers, data, completed=True)
@@ -626,6 +638,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/milestones",
             None,
+            None,
             post_parameters
         )
         return github.Milestone.Milestone(self._requester, headers, data, completed=True)
@@ -664,6 +677,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/pulls",
             None,
+            None,
             post_parameters
         )
         return github.PullRequest.PullRequest(self._requester, headers, data, completed=True)
@@ -677,6 +691,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -722,6 +737,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
@@ -742,6 +758,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             url,
             None,
+            None,
             None
         )
         return headers["location"]
@@ -769,6 +786,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/branches/" + branch,
             None,
+            None,
             None
         )
         return github.Branch.Branch(self._requester, headers, data, completed=True)
@@ -808,6 +826,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/comments/" + str(id),
             None,
+            None,
             None
         )
         return github.CommitComment.CommitComment(self._requester, headers, data, completed=True)
@@ -835,6 +854,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/commits/" + sha,
             None,
+            None,
             None
         )
         return github.Commit.Commit(self._requester, headers, data, completed=True)
@@ -893,6 +913,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/contents" + path,
             url_parameters,
+            None,
             None
         )
         return github.ContentFile.ContentFile(self._requester, headers, data, completed=True)
@@ -913,6 +934,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/contents" + path,
             url_parameters,
+            None,
             None
         )
 
@@ -922,6 +944,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
                 "GET",
                 headers['location'],
                 url_parameters,
+                None,
                 None
             )
 
@@ -953,6 +976,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/downloads/" + str(id),
             None,
+            None,
             None
         )
         return github.Download.Download(self._requester, headers, data, completed=True)
@@ -1004,6 +1028,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/git/blobs/" + sha,
             None,
+            None,
             None
         )
         return github.GitBlob.GitBlob(self._requester, headers, data, completed=True)
@@ -1019,6 +1044,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/git/commits/" + sha,
             None,
+            None,
             None
         )
         return github.GitCommit.GitCommit(self._requester, headers, data, completed=True)
@@ -1037,6 +1063,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + prefix + ref,
             None,
+            None,
             None
         )
         return github.GitRef.GitRef(self._requester, headers, data, completed=True)
@@ -1064,6 +1091,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/git/tags/" + sha,
             None,
+            None,
             None
         )
         return github.GitTag.GitTag(self._requester, headers, data, completed=True)
@@ -1084,6 +1112,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/git/trees/" + sha,
             url_parameters,
+            None,
             None
         )
         return github.GitTree.GitTree(self._requester, headers, data, completed=True)
@@ -1099,6 +1128,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/hooks/" + str(id),
             None,
+            None,
             None
         )
         return github.Hook.Hook(self._requester, headers, data, completed=True)
@@ -1126,6 +1156,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/issues/" + str(number),
             None,
+            None,
             None
         )
         return github.Issue.Issue(self._requester, headers, data, completed=True)
@@ -1217,6 +1248,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/issues/events/" + str(id),
             None,
+            None,
             None
         )
         return github.IssueEvent.IssueEvent(self._requester, headers, data, completed=True)
@@ -1244,6 +1276,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/keys/" + str(id),
             None,
+            None,
             None
         )
         return github.RepositoryKey.RepositoryKey(self._requester, headers, data, completed=True, repoUrl=self._url)
@@ -1271,6 +1304,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/labels/" + urllib.quote(name),
             None,
+            None,
             None
         )
         return github.Label.Label(self._requester, headers, data, completed=True)
@@ -1296,6 +1330,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/languages",
             None,
+            None,
             None
         )
         return data
@@ -1311,6 +1346,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/milestones/" + str(number),
             None,
+            None,
             None
         )
         return github.Milestone.Milestone(self._requester, headers, data, completed=True)
@@ -1363,6 +1399,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/pulls/" + str(number),
             None,
+            None,
             None
         )
         return github.PullRequest.PullRequest(self._requester, headers, data, completed=True)
@@ -1433,6 +1470,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/readme",
             url_parameters,
+            None,
             None
         )
         return github.ContentFile.ContentFile(self._requester, headers, data, completed=True)
@@ -1508,6 +1546,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/assignees/" + assignee._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -1523,6 +1562,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/collaborators/" + collaborator._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -1540,6 +1580,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "GET",
             "/legacy/issues/search/" + self.owner.login + "/" + self.name + "/" + state + "/" + urllib.quote(keyword),
             None,
+            None,
             None
         )
         return [
@@ -1568,6 +1609,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             self.url + "/merges",
             None,
+            None,
             post_parameters
         )
         if data is None:
@@ -1586,6 +1628,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url + "/collaborators/" + collaborator._identity,
             None,
+            None,
             None
         )
 
@@ -1627,6 +1670,7 @@ class Repository(github.GithubObject.CompletableGithubObject):
             "POST",
             "/hub",
             None,
+            None,
             post_parameters,
         )
 
diff --git a/github/RepositoryKey.py b/github/RepositoryKey.py
index 074985d8..22b59621 100644
--- a/github/RepositoryKey.py
+++ b/github/RepositoryKey.py
@@ -91,6 +91,7 @@ class RepositoryKey(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.__customUrl,
             None,
+            None,
             None
         )
 
@@ -112,6 +113,7 @@ class RepositoryKey(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.__customUrl,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
diff --git a/github/Requester.py b/github/Requester.py
index feed86b2..b161de13 100644
--- a/github/Requester.py
+++ b/github/Requester.py
@@ -168,11 +168,11 @@ class Requester:
             'See http://developer.github.com/v3/#user-agent-required'
         self.__userAgent = user_agent
 
-    def requestJsonAndCheck(self, verb, url, parameters, input):
-        return self.__check(*self.requestJson(verb, url, parameters, input))
+    def requestJsonAndCheck(self, verb, url, parameters, headers, input):
+        return self.__check(*self.requestJson(verb, url, parameters, headers, input))
 
-    def requestMultipartAndCheck(self, verb, url, parameters, input):
-        return self.__check(*self.requestMultipart(verb, url, parameters, input))
+    def requestMultipartAndCheck(self, verb, url, parameters, headers, input):
+        return self.__check(*self.requestMultipart(verb, url, parameters, headers, input))
 
     def __check(self, status, responseHeaders, output):
         output = self.__structuredFromJson(output)
@@ -208,13 +208,13 @@ class Requester:
             except ValueError, e:
                 return {'data': data}
 
-    def requestJson(self, verb, url, parameters, input):
+    def requestJson(self, verb, url, parameters, headers, input):
         def encode(input):
             return "application/json", json.dumps(input)
 
-        return self.__requestEncode(verb, url, parameters, input, encode)
+        return self.__requestEncode(verb, url, parameters, headers, input, encode)
 
-    def requestMultipart(self, verb, url, parameters, input):
+    def requestMultipart(self, verb, url, parameters, headers, input):
         def encode(input):
             boundary = "----------------------------3c3ba8b523b2"
             eol = "\r\n"
@@ -228,16 +228,16 @@ class Requester:
             encoded_input += "--" + boundary + "--" + eol
             return "multipart/form-data; boundary=" + boundary, encoded_input
 
-        return self.__requestEncode(verb, url, parameters, input, encode)
+        return self.__requestEncode(verb, url, parameters, headers, input, encode)
 
-    def __requestEncode(self, verb, url, parameters, input, encode):
+    def __requestEncode(self, verb, url, parameters, requestHeaders, input, encode):
         assert verb in ["HEAD", "GET", "POST", "PATCH", "PUT", "DELETE"]
         if parameters is None:
             parameters = dict()
+        if requestHeaders is None:
+            requestHeaders = dict()
 
-        requestHeaders = dict()
         self.__authenticate(url, requestHeaders, parameters)
-        self.__conditional(requestHeaders, parameters)
         requestHeaders["User-Agent"] = self.__userAgent
 
         url = self.__makeAbsoluteUrl(url)
@@ -288,18 +288,6 @@ class Requester:
         if self.__authorizationHeader is not None:
             requestHeaders["Authorization"] = self.__authorizationHeader
 
-    def __conditional(self, requestHeaders, parameters):
-        # #193: Why pass etag and last_modified by param "parameters"?
-        # #193: May be better to add a specific param "headers" to methods requestFoobar?
-        etag = parameters.get(Consts.REQ_IF_NONE_MATCH)
-        last_modified = parameters.get(Consts.REQ_IF_MODIFIED_SINCE)
-        if etag is not None:
-            requestHeaders[Consts.REQ_IF_NONE_MATCH] = etag
-            del parameters[Consts.REQ_IF_NONE_MATCH]
-        if last_modified is not None:
-            requestHeaders[Consts.REQ_IF_MODIFIED_SINCE] = last_modified
-            del parameters[Consts.REQ_IF_MODIFIED_SINCE]
-
     def __makeAbsoluteUrl(self, url):
         # URLs generated locally will be relative to __base_url
         # URLs returned from the server will start with __base_url
diff --git a/github/Team.py b/github/Team.py
index 804ed3ab..d8fb7379 100644
--- a/github/Team.py
+++ b/github/Team.py
@@ -96,6 +96,7 @@ class Team(github.GithubObject.CompletableGithubObject):
             "PUT",
             self.url + "/members/" + member._identity,
             None,
+            None,
             None
         )
 
@@ -110,6 +111,7 @@ class Team(github.GithubObject.CompletableGithubObject):
             "PUT",
             self.url + "/repos/" + repo._identity,
             None,
+            None,
             None
         )
 
@@ -122,6 +124,7 @@ class Team(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -143,6 +146,7 @@ class Team(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)
@@ -182,6 +186,7 @@ class Team(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/members/" + member._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -197,6 +202,7 @@ class Team(github.GithubObject.CompletableGithubObject):
             "GET",
             self.url + "/repos/" + repo._identity,
             None,
+            None,
             None
         )
         return status == 204
@@ -212,6 +218,7 @@ class Team(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url + "/members/" + member._identity,
             None,
+            None,
             None
         )
 
@@ -226,6 +233,7 @@ class Team(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url + "/repos/" + repo._identity,
             None,
+            None,
             None
         )
 
diff --git a/github/UserKey.py b/github/UserKey.py
index 44cc5808..83a26009 100644
--- a/github/UserKey.py
+++ b/github/UserKey.py
@@ -82,6 +82,7 @@ class UserKey(github.GithubObject.CompletableGithubObject):
             "DELETE",
             self.url,
             None,
+            None,
             None
         )
 
@@ -103,6 +104,7 @@ class UserKey(github.GithubObject.CompletableGithubObject):
             "PATCH",
             self.url,
             None,
+            None,
             post_parameters
         )
         self._useAttributes(data)