diff --git a/github/GitRelease.py b/github/GitRelease.py
index 8ee92ed0..bf3f48e3 100644
--- a/github/GitRelease.py
+++ b/github/GitRelease.py
@@ -157,22 +157,6 @@ class GitRelease(github.GithubObject.CompletableGithubObject):
         self._completeIfNotSet(self._zipball_url)
         return self._zipball_url.value
 
-    @property
-    def prerelease(self):
-        """
-        :type: string
-        """
-        self._completeIfNotSet(self._prerelease)
-        return self._prerelease.value
-
-    @property
-    def draft(self):
-        """
-        :type: string
-        """
-        self._completeIfNotSet(self._draft)
-        return self._draft.value
-
     def delete_release(self):
         headers, data = self._requester.requestJsonAndCheck(
             "DELETE",
@@ -264,10 +248,6 @@ class GitRelease(github.GithubObject.CompletableGithubObject):
             self._upload_url = self._makeStringAttribute(attributes["upload_url"])
         if "html_url" in attributes:
             self._html_url = self._makeStringAttribute(attributes["html_url"])
-        if "prerelease" in attributes:
-            self._prerelease = self._makeBoolAttribute(attributes["prerelease"])
-        if "draft" in attributes:
-            self._draft = self._makeBoolAttribute(attributes["draft"])
         if "created_at" in attributes:
             self._created_at = self._makeDatetimeAttribute(attributes["created_at"])
         if "published_at" in attributes: