diff --git a/pkgs/development/libraries/haskell/stringbuilder/default.nix b/pkgs/development/libraries/haskell/stringbuilder/default.nix
index e75bc82159f4..49a8ddd509ab 100644
--- a/pkgs/development/libraries/haskell/stringbuilder/default.nix
+++ b/pkgs/development/libraries/haskell/stringbuilder/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "stringbuilder";
-  version = "0.4.0";
-  sha256 = "0v0lpb13khpiygfdkyzzsf64anxjykwvjsrkds836whm1bv86lhl";
+  version = "0.5.0";
+  sha256 = "1ap95xphqnrhv64c2a137wqslkdmb2jjd9ldb17gs1pw48k8hrl9";
   testDepends = [ hspec QuickCheck ];
   meta = {
     description = "A writer monad for multi-line string literals";