diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 3bbf74f2044d..32529f30dba0 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -18145,11 +18145,11 @@ in modules // {
 
   pytz = buildPythonPackage rec {
     name = "pytz-${version}";
-    version = "2015.7";
+    version = "2016.3";
 
     src = pkgs.fetchurl {
       url = "http://pypi.python.org/packages/source/p/pytz/${name}.tar.gz";
-      sha256 = "99266ef30a37e43932deec2b7ca73e83c8dbc3b9ff703ec73eca6b1dae6befea";
+      sha256 = "1a3hjclyylc4m1v1dn04b38wm2vl649ijdswpg0d8m8n0lcxlj9l";
     };
 
     meta = {