diff --git a/pkgs/development/libraries/haskell/contravariant/default.nix b/pkgs/development/libraries/haskell/contravariant/default.nix
index d38058a25dec..48dfaa443858 100644
--- a/pkgs/development/libraries/haskell/contravariant/default.nix
+++ b/pkgs/development/libraries/haskell/contravariant/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "contravariant";
-  version = "0.4.4";
-  sha256 = "1b4422wpcyvrf4r7rr8c8wa008f5ykaxs17vr4plp91rcczr87s4";
+  version = "0.5";
+  sha256 = "0jw66irh3mjpbd25jh4pzy73jxfaghvlqkngqa1vd0v2i99j6sap";
   buildDepends = [ tagged transformers transformersCompat ];
   meta = {
     homepage = "http://github.com/ekmett/contravariant/";