diff --git a/CHANGES.rst b/CHANGES.rst
index 7f3cb0f7f..9daff9d56 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -10,7 +10,7 @@ Changelog (Pillow)
 - PDF: Renamed parameter to not shadow built-in dict #2612
   [kijeong]
 
-4.2.1 (unreleased)
+4.2.1 (2017-07-06)
 ------------------
 
 - CI: Fix version specification and test on CI for PyPy/Windows #2608
diff --git a/docs/installation.rst b/docs/installation.rst
index 3f634632a..f7834c495 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -379,7 +379,7 @@ These platforms are built and tested for every change.
 +----------------------------------+-------------------------------+-----------------------+
 | Ubuntu Linux 12.04 LTS           | 2.7                           |x86-64                 |
 +----------------------------------+-------------------------------+-----------------------+
-| Windows Server 2012 R2           | 2.7,3.3,3.4                   |x86, x86-64            |
+| Windows Server 2012 R2           | 2.7,3.3,3.4,pypy              |x86, x86-64            |
 +----------------------------------+-------------------------------+-----------------------+
 
 \* Mac OS X CI is not run for every commit, but is run for every release.
diff --git a/docs/releasenotes/4.2.1.rst b/docs/releasenotes/4.2.1.rst
new file mode 100644
index 000000000..c9e953da4
--- /dev/null
+++ b/docs/releasenotes/4.2.1.rst
@@ -0,0 +1,11 @@
+4.2.1
+-----
+
+There are no functional changes in this release.
+
+Fixed Windows PyPy Build
+========================
+
+A change in the 4.2.0 cycle broke the Windows PyPy build. This has
+been fixed, and PyPy is now part of the Windows CI matrix.
+
diff --git a/docs/releasenotes/index.rst b/docs/releasenotes/index.rst
index 624c727a9..27b12face 100644
--- a/docs/releasenotes/index.rst
+++ b/docs/releasenotes/index.rst
@@ -6,6 +6,7 @@ Release Notes
 .. toctree::
   :maxdepth: 2
 
+  4.2.1
   4.2.0
   4.1.1
   4.1.0