diff --git a/pkgs/development/libraries/haskell/regular/default.nix b/pkgs/development/libraries/haskell/regular/default.nix
index 4b4e5458df2..0085d866567 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 = "0.3.3";
-  sha256 = "1xlpp60nvdiqkcn66dnpww72hcawyc1w7cd9zk9kk88x574kqzf7";
+  version = "0.3.4";
+  sha256 = "10gfid99xcqv3i9rp4x8hykk91qq3h7b7lxzsl7ii58vmifa4kgq";
   meta = {
     description = "Generic programming library for regular datatypes";
     license = self.stdenv.lib.licenses.bsd3;