diff --git a/pkgs/development/compilers/arachne-pnr/default.nix b/pkgs/development/compilers/arachne-pnr/default.nix
index 70acb79dc7e4..bf8511704f80 100644
--- a/pkgs/development/compilers/arachne-pnr/default.nix
+++ b/pkgs/development/compilers/arachne-pnr/default.nix
@@ -4,13 +4,13 @@ with builtins;
 
 stdenv.mkDerivation rec {
   name = "arachne-pnr-${version}";
-  version = "2018.03.07";
+  version = "2018.05.03";
 
   src = fetchFromGitHub {
     owner  = "cseed";
     repo   = "arachne-pnr";
-    rev    = "6701132cbd5c7b31edd0ff18ca6727eb3691186b";
-    sha256 = "1c55k9gpq042mkyxrblwskbmr3v0baj4gkwm45v1gvmhdza6gfw8";
+    rev    = "ea2d04215bc0fd6072cda244caeb6670892033b3";
+    sha256 = "0qhf5djyh0pzmgv33rjnnqq6asmmwxjdadvr18a83iy9pll6gg5k";
   };
 
   enableParallelBuilding = true;