diff --git a/pkgs/development/libraries/haskell/utf8-string/default.nix b/pkgs/development/libraries/haskell/utf8-string/default.nix
index 4570a863f997..0928ae0347b1 100644
--- a/pkgs/development/libraries/haskell/utf8-string/default.nix
+++ b/pkgs/development/libraries/haskell/utf8-string/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "utf8-string";
-  version = "0.3.6";
-  sha256 = "c8c74555174edfb96145585c9b80780d0fc55ba249282b8a4c5968cca7c09d69";
+  version = "0.3.7";
+  sha256 = "1s59xsw1i311rpxb7arnd280pjqab5mrlfjmxbabknka8wqlnnvq";
   meta = {
     homepage = "http://github.com/glguy/utf8-string/";
     description = "Support for reading and writing UTF8 Strings";