diff --git a/pkgs/development/libraries/haskell/fay/default.nix b/pkgs/development/libraries/haskell/fay/default.nix
index c00b009c51d7..1e3ba43cb3eb 100644
--- a/pkgs/development/libraries/haskell/fay/default.nix
+++ b/pkgs/development/libraries/haskell/fay/default.nix
@@ -9,8 +9,8 @@
 
 cabal.mkDerivation (self: {
   pname = "fay";
-  version = "0.20.1.3";
-  sha256 = "1r9a1my8wydxx92xg04kacw90s1r4bms84fvs1w52r73knp5kb6r";
+  version = "0.20.1.4";
+  sha256 = "022q9ac12hviamgl959v68k5mmr1i0wfisxxqa435l2y3g3yszb1";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [