diff --git a/pkgs/development/libraries/haskell/regular/default.nix b/pkgs/development/libraries/haskell/regular/default.nix
index 8a3e740491c..97920780533 100644
--- a/pkgs/development/libraries/haskell/regular/default.nix
+++ b/pkgs/development/libraries/haskell/regular/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "regular";
-  version = "0.3.4.2";
-  sha256 = "0fshjpbgabdcsa9a4cjmvfrzy7db4s679rprdbrhhfwf5xiszs2s";
+  version = "0.3.4.3";
+  sha256 = "12pc58agqb4fi0riwxjf0kykn1z12273q8dcdd0fh2x1ddxwgg2r";
   meta = {
     description = "Generic programming library for regular datatypes";
     license = self.stdenv.lib.licenses.bsd3;