diff --git a/pkgs/development/libraries/haskell/profunctors/default.nix b/pkgs/development/libraries/haskell/profunctors/default.nix
index 1c3268256fb..248cd89a2ba 100644
--- a/pkgs/development/libraries/haskell/profunctors/default.nix
+++ b/pkgs/development/libraries/haskell/profunctors/default.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "profunctors";
-  version = "4.1";
-  sha256 = "1i8hscvznbca8wzjx521hwsinwab85gqshz49pdlkmdgydaagzxj";
+  version = "4.2";
+  sha256 = "0ikbp88798q7hdvi5vpc68q5bblsh43g9xnlwrifrn5fp3x3lq56";
   buildDepends = [
     comonad distributive semigroupoids tagged transformers
   ];