diff --git a/changelog.md b/changelog.md
index 4bbeeb374a208bbd6f1a29d6e54a05009d26a876..c773d3d6144baadfd5be1daa1d9e92a3d8f9279c 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,9 +1,11 @@
 # Changelog for [`unix` package](http://hackage.haskell.org/package/unix)
 
-## 2.7.2.1  *Sep 2016*
+## 2.7.2.1  *Nov 2016*
 
   * Don't use `readdir_r` if its deprecated.
 
+  * Add argument documentation for Env modules
+
 ## 2.7.2.0  *Apr 2016*
 
   * Bundled with GHC 8.0.1
diff --git a/unix.cabal b/unix.cabal
index 02d583e33165f1375477858cc95d2e55a72c2a7c..5ba2ddd47f26ce50959204a739b09ab16c6a6186 100644
--- a/unix.cabal
+++ b/unix.cabal
@@ -1,5 +1,5 @@
 name:           unix
-version:        2.7.2.0
+version:        2.7.2.1
 -- NOTE: Don't forget to update ./changelog.md
 license:        BSD3
 license-file:   LICENSE