diff --git a/pkgs/development/libraries/haskell/zlib-enum/default.nix b/pkgs/development/libraries/haskell/zlib-enum/default.nix
index d4ec47410fc..f799194c0f6 100644
--- a/pkgs/development/libraries/haskell/zlib-enum/default.nix
+++ b/pkgs/development/libraries/haskell/zlib-enum/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "zlib-enum";
-  version = "0.2.2.1";
-  sha256 = "02ava6h40bqfmby33683nxasfw5fmrgfvbx6kqgz1gqz5921gjx9";
+  version = "0.2.3";
+  sha256 = "0lr72h4wlclav0p0j5wwaxifq97lw7rh3612lva73fg45akl9di1";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ enumerator transformers zlibBindings ];