diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 3a6d88545ec2..3de2e266a7f9 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2647,19 +2647,21 @@ let
   };
 
   decorator = buildPythonPackage rec {
-    name = "decorator-3.4.0";
+    name = "decorator-${version}";
+    version = "3.4.2";
 
     src = pkgs.fetchurl {
       url = "http://pypi.python.org/packages/source/d/decorator/${name}.tar.gz";
-      md5 = "1e8756f719d746e2fc0dd28b41251356";
+      sha256 = "7320002ce61dea6aa24adc945d9d7831b3669553158905cdd12f5d0027b54b44";
     };
 
     meta = {
       homepage = http://pypi.python.org/pypi/decorator;
+      description = "Better living through Python with decorators";
+      license = licenses.mit;
     };
   };
 
-
   deform = buildPythonPackage rec {
     name = "deform-2.0a2";