diff --git a/pkgs/development/libraries/haskell/th-desugar/default.nix b/pkgs/development/libraries/haskell/th-desugar/default.nix
index 827828d6474..b8f47865424 100644
--- a/pkgs/development/libraries/haskell/th-desugar/default.nix
+++ b/pkgs/development/libraries/haskell/th-desugar/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "th-desugar";
-  version = "1.3.1";
-  sha256 = "1wi0c5d1w6vjjk580zhypgqnnkndcsx4cmx5qy01w97h6kyj8913";
+  version = "1.4.0";
+  sha256 = "0jadwqhk9dqnicg3p958a6cyfvl70amjc1hl7bhlygpxpdfffwad";
   buildDepends = [ mtl syb ];
   testDepends = [ hspec HUnit mtl syb ];
   meta = {