diff --git a/pkgs/development/tools/parsing/hammer/default.nix b/pkgs/development/tools/parsing/hammer/default.nix
index 5bc934a9806..7dbbf10b486 100644
--- a/pkgs/development/tools/parsing/hammer/default.nix
+++ b/pkgs/development/tools/parsing/hammer/default.nix
@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation rec {
   name = "hammer-${version}";
-  version = "1.0.0-rc3";
+  version = "e7aa734";
 
   src = fetchgit {
     url = "git://github.com/UpstandingHackers/hammer";