diff --git a/pkgs/development/libraries/haskell/th-desugar/default.nix b/pkgs/development/libraries/haskell/th-desugar/default.nix
index 5efddd3e9d38..c6493736001d 100644
--- a/pkgs/development/libraries/haskell/th-desugar/default.nix
+++ b/pkgs/development/libraries/haskell/th-desugar/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "th-desugar";
-  version = "1.4.1";
-  sha256 = "1pjv301bshdmn3s5nrmmcx5d1b80c410lml73sai68dhx7v64vw2";
+  version = "1.4.2";
+  sha256 = "16l0khjx2wppnm9spp6mg659m95hxjkzfv3pjw5ays3z6clhx8b9";
   buildDepends = [ mtl syb ];
   testDepends = [ hspec HUnit mtl syb ];
   meta = {