diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 653bfeb77e562e..fc624704a6913b 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3254,11 +3254,11 @@ in modules // {
 
   certifi = buildPythonPackage rec {
     name = "certifi-${version}";
-    version = "2015.11.20.1";
+    version = "2016.2.28";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/c/certifi/${name}.tar.gz";
-      sha256 = "05lgwf9rz1kn465azy2bpb3zmpnsn9gkypbhnjlclchv98ssgc1h";
+      sha256 = "5e8eccf95924658c97b990b50552addb64f55e1e3dfe4880456ac1f287dc79d0";
     };
 
     meta = {