chore: release 1.21.3 (#607)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78863ff..d570479 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
[1]: https://pypi.org/project/google-auth/#history
+### [1.21.3](https://www.github.com/googleapis/google-auth-library-python/compare/v1.21.2...v1.21.3) (2020-09-22)
+
+
+### Bug Fixes
+
+* fix expiry for `to_json()` ([#589](https://www.github.com/googleapis/google-auth-library-python/issues/589)) ([d0e0aba](https://www.github.com/googleapis/google-auth-library-python/commit/d0e0aba0a9f665268ffa1b22d44f4bd7e9b449d6)), closes [/github.com/googleapis/oauth2client/blob/master/oauth2client/client.py#L55](https://www.github.com/googleapis//github.com/googleapis/oauth2client/blob/master/oauth2client/client.py/issues/L55)
+
### [1.21.2](https://www.github.com/googleapis/google-auth-library-python/compare/v1.21.1...v1.21.2) (2020-09-08)
diff --git a/setup.py b/setup.py
index ea43594..1c3578f 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@
with io.open("README.rst", "r") as fh:
long_description = fh.read()
-version = "1.21.2"
+version = "1.21.3"
setup(
name="google-auth",