diff --git a/pkgs/development/libraries/haskell/snap/snap.nix b/pkgs/development/libraries/haskell/snap/snap.nix
index aab1a7bf89be..c28ee69fb2c0 100644
--- a/pkgs/development/libraries/haskell/snap/snap.nix
+++ b/pkgs/development/libraries/haskell/snap/snap.nix
@@ -10,8 +10,8 @@
 
 cabal.mkDerivation (self: {
   pname = "snap";
-  version = "0.13.2.9";
-  sha256 = "1iv29mbbm1xjfrq3ys7zpskjpcwx6k08zrnrs1yj62yg5aa6bnim";
+  version = "0.13.3.1";
+  sha256 = "016azx90gxjkhmncpnqvqrwsk9kbkz315z088wm7y67s97lpnr9c";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [