diff --git a/github/GitRelease.py b/github/GitRelease.py
index bf3f48e3..3b32e8f1 100644
--- a/github/GitRelease.py
+++ b/github/GitRelease.py
@@ -77,6 +77,14 @@ class GitRelease(github.GithubObject.CompletableGithubObject):
         self._completeIfNotSet(self._tag_name)
         return self._tag_name.value
 
+    @property
+    def target_commitish(self):
+        """
+        :type: string
+        """
+        self._completeIfNotSet(self._target_commitish)
+        return self._target_commitish.value
+
     @property
     def draft(self):
         """
@@ -216,6 +224,7 @@ class GitRelease(github.GithubObject.CompletableGithubObject):
         self._body = github.GithubObject.NotSet
         self._title = github.GithubObject.NotSet
         self._tag_name = github.GithubObject.NotSet
+        self._target_commitish = github.GithubObject.NotSet
         self._draft = github.GithubObject.NotSet
         self._prerelease = github.GithubObject.NotSet
         self._author = github.GithubObject.NotSet
@@ -236,6 +245,8 @@ class GitRelease(github.GithubObject.CompletableGithubObject):
             self._title = self._makeStringAttribute(attributes["name"])
         if "tag_name" in attributes:
             self._tag_name = self._makeStringAttribute(attributes["tag_name"])
+        if "target_commitish" in attributes:
+            self._target_commitish = self._makeStringAttribute(attributes["target_commitish"])
         if "draft" in attributes:
             self._draft = self._makeBoolAttribute(attributes["draft"])
         if "prerelease" in attributes:
diff --git a/github/tests/GitRelease.py b/github/tests/GitRelease.py
index 0dc9f80f..931681ff 100644
--- a/github/tests/GitRelease.py
+++ b/github/tests/GitRelease.py
@@ -62,6 +62,7 @@ class Release(Framework.TestCase):
         self.release = self.g.get_user().get_repo("PyGithub").get_releases()[0]
         self.assertEqual(self.release.id, 1210814)
         self.assertEqual(self.release.tag_name, "v1.25.2")
+        self.assertEqual(self.release.target_commitish, "master")
         self.assertEqual(self.release.upload_url, "https://uploads.github.com/repos/edhollandAL/PyGithub/releases/1210814/assets{?name}")
         self.assertEqual(self.release.body, "Body")
         self.assertEqual(self.release.title, "Test")