diff --git a/pkgs/development/compilers/ats2/default.nix b/pkgs/development/compilers/ats2/default.nix
index 0f46b7aeb6dc..ae9a202a529e 100644
--- a/pkgs/development/compilers/ats2/default.nix
+++ b/pkgs/development/compilers/ats2/default.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchurl, gmp }:
 
-let version = "0.0.3"; in stdenv.mkDerivation {
+let version = "0.0.5"; in stdenv.mkDerivation {
   name = "ats2-postiats-${version}";
 
   src = fetchurl {
     url = "mirror://sourceforge/ats2-lang/ATS2-Postiats-${version}.tgz";
-    sha256 = "0hq63zrmm92j5ffnsmylhhllm8kgjpjkaj4xvzz1zlshz39lijxp";
+    sha256 = "1rzcqc7fwqf0y4cc14lr282r25s66jygf6cxrnf5l8p5p550l0dl";
   };
 
   buildInputs = [ gmp ];