diff --git a/pkgs/development/libraries/haskell/uu-parsinglib/default.nix b/pkgs/development/libraries/haskell/uu-parsinglib/default.nix
index 784fe915814f..6df06579942e 100644
--- a/pkgs/development/libraries/haskell/uu-parsinglib/default.nix
+++ b/pkgs/development/libraries/haskell/uu-parsinglib/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self : {
   pname = "uu-parsinglib";
-  version = "2.3.0";
-  sha256 = "0ddf5ff41e59d8a777942f821170f1e6c7373712b029261a7efbc16fa663b671";
+  version = "2.3.1";
+  sha256 = "63ed4257f360a861b13f3e0edad6c17bbad90a0e3e031de49ed4d13a1ace98d2";
   meta = {
     description = "New version of the Utrecht University parser combinator library";
   };