diff --git a/pkgs/development/libraries/haskell/monoid-transformer/default.nix b/pkgs/development/libraries/haskell/monoid-transformer/default.nix
index d4e5962ec85..5894eccd4b7 100644
--- a/pkgs/development/libraries/haskell/monoid-transformer/default.nix
+++ b/pkgs/development/libraries/haskell/monoid-transformer/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "monoid-transformer";
-  version = "0.0.2";
-  sha256 = "0hd8jb1iw6lbgml3f08n680bdij56cjanpkr4fc1jr7qn6yzzb2j";
+  version = "0.0.3";
+  sha256 = "1f06ppvv50w5pacm4bs89zwkydih626cgbd2z6xqbp8cmhg6dj4l";
   meta = {
     description = "Monoid counterparts to some ubiquitous monad transformers";
     license = self.stdenv.lib.licenses.bsd3;