diff --git a/pkgs/development/libraries/haskell/wai-app-static/default.nix b/pkgs/development/libraries/haskell/wai-app-static/default.nix
index 7feed2df4bc..74ec00c58fd 100644
--- a/pkgs/development/libraries/haskell/wai-app-static/default.nix
+++ b/pkgs/development/libraries/haskell/wai-app-static/default.nix
@@ -6,8 +6,8 @@
 
 cabal.mkDerivation (self: {
   pname = "wai-app-static";
-  version = "1.3.1.2";
-  sha256 = "1i0j3n0cp1zq43g06nb3cxajd4k9isg4chdwzzlyimm078a9w54x";
+  version = "1.3.1.3";
+  sha256 = "0h6m1an3srkvyaz50w16v2mhjyfdqbqq2d7ng3yhrrmb1fyvhas1";
   buildDepends = [
     base64Bytestring blazeBuilder blazeHtml blazeMarkup cereal
     cryptoConduit cryptohash fileEmbed httpDate httpTypes mimeTypes