diff --git a/CHANGELOG.md b/CHANGELOG.md
index a8fddc9..310f6af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,18 @@
 
 [1]: https://pypi.org/project/google-auth/#history
 
+### [2.3.1](https://www.github.com/googleapis/google-auth-library-python/compare/v2.3.0...v2.3.1) (2021-10-21)
+
+
+### Bug Fixes
+
+* add back python 2.7 for gcloud usage only ([#892](https://www.github.com/googleapis/google-auth-library-python/issues/892)) ([5bd5ccf](https://www.github.com/googleapis/google-auth-library-python/commit/5bd5ccf7cf229f033c7152ce0b650a40feb25f81))
+
+
+### Documentation
+
+* Fix formatting of `GCE_METADATA_HOST` ([#890](https://www.github.com/googleapis/google-auth-library-python/issues/890)) ([e2b3c98](https://www.github.com/googleapis/google-auth-library-python/commit/e2b3c98cd8c67b702be1b711c06ee7b9bbedb8ba))
+
 ## [2.3.0](https://www.github.com/googleapis/google-auth-library-python/compare/v2.2.1...v2.3.0) (2021-10-07)
 
 
diff --git a/google/auth/version.py b/google/auth/version.py
index 60805d9..7ca7779 100644
--- a/google/auth/version.py
+++ b/google/auth/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.3.0"
+__version__ = "2.3.1"