diff --git a/pkgs/development/libraries/haskell/warp/default.nix b/pkgs/development/libraries/haskell/warp/default.nix
index 31297e10d06..50c046b8975 100644
--- a/pkgs/development/libraries/haskell/warp/default.nix
+++ b/pkgs/development/libraries/haskell/warp/default.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "warp";
-  version = "0.4.3";
-  sha256 = "1g1fyys4j5cd2lp8818060i970f6fpxnjgyvb5m4r9asn7p1z4yc";
+  version = "0.4.3.1";
+  sha256 = "19cj4jhl647gyy6nl3x2vi6v4g0y9q3w5a5lxvvfnfwgmcqnq3lk";
   buildDepends = [
     blazeBuilder blazeBuilderEnumerator caseInsensitive enumerator
     httpTypes network simpleSendfile transformers unixCompat wai