diff --git a/pkgs/development/libraries/haskell/constraints/default.nix b/pkgs/development/libraries/haskell/constraints/default.nix
index 0fe2cb8864a6..87ec5d82724b 100644
--- a/pkgs/development/libraries/haskell/constraints/default.nix
+++ b/pkgs/development/libraries/haskell/constraints/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "constraints";
-  version = "0.3.2";
-  sha256 = "1fmjl6dh2iswvmq8r3izplp6zg9m8yq1c4rj0zpqjbv2iqsi4kl1";
+  version = "0.3.3";
+  sha256 = "0mglqd6l6bc333i7gymbm8q037hj5fny6jzyg1zmw5kg6r3xcwdi";
   buildDepends = [ newtype ];
   meta = {
     homepage = "http://github.com/ekmett/constraints/";