diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e1eef8..a43f658 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,19 @@
 
 [1]: https://pypi.org/project/google-auth/#history
 
+## [1.28.0](https://www.github.com/googleapis/google-auth-library-python/compare/v1.27.1...v1.28.0) (2021-03-16)
+
+
+### Features
+
+* allow the AWS_DEFAULT_REGION environment variable ([#721](https://www.github.com/googleapis/google-auth-library-python/issues/721)) ([199da47](https://www.github.com/googleapis/google-auth-library-python/commit/199da4781029916dc075738ec7bd173bd89abe54))
+* expose library version at `google.auth.__version` ([#683](https://www.github.com/googleapis/google-auth-library-python/issues/683)) ([a2cbc32](https://www.github.com/googleapis/google-auth-library-python/commit/a2cbc3245460e1ae1d310de6a2a4007d5a3a06b7))
+
+
+### Bug Fixes
+
+* fix unit tests so they can work in g3 ([#714](https://www.github.com/googleapis/google-auth-library-python/issues/714)) ([d80c85f](https://www.github.com/googleapis/google-auth-library-python/commit/d80c85f285ae1a44ddc5a5d94a66e065a79f6d19))
+
 ### [1.27.1](https://www.github.com/googleapis/google-auth-library-python/compare/v1.27.0...v1.27.1) (2021-02-26)
 
 
diff --git a/google/auth/version.py b/google/auth/version.py
index 54ad932..603212e 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__ = "1.27.1"
+__version__ = "1.28.0"