Release v1.2.1 (#216)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index e281f4a..d359cf6 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,14 @@
 Changelog
 =========
 
+v1.2.1
+------
+
+- Excluded compiled Python files in source distributions. (#215)
+- Updated docs for creating RSASigner from string. (#213)
+- Use ``six.raise_from`` wherever possible. (#212)
+- Fixed a typo in a comment ``seconds`` not ``sections``. (#210)
+
 v1.2.0
 ------
 
diff --git a/setup.py b/setup.py
index d76570f..9308707 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@
 
 setup(
     name='google-auth',
-    version='1.2.0',
+    version='1.2.1',
     author='Google Cloud Platform',
     author_email='jonwayne+google-auth@google.com',
     description='Google Authentication Library',