diff --git a/pkgs/applications/science/logic/symbiyosys/default.nix b/pkgs/applications/science/logic/symbiyosys/default.nix
index 98acebcf2cc..2580b9b0fbe 100644
--- a/pkgs/applications/science/logic/symbiyosys/default.nix
+++ b/pkgs/applications/science/logic/symbiyosys/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   name = "symbiyosys-${version}";
-  version = "2018.03.21";
+  version = "2018.05.03";
 
   src = fetchFromGitHub {
     owner  = "yosyshq";
     repo   = "symbiyosys";
-    rev    = "76a624a363bc44df102359595d34f29370c6668b";
-    sha256 = "1ikax1yiqgj5442wcgp1iigw8wiyw7k848z4ykn7k068kbc320bm";
+    rev    = "35d956c7bb77c0602d198035b2d73a9c61cb4de4";
+    sha256 = "02zg3nkwp3fdjwz1agvsn55k1xipwh2rradb0bgjrjpsmmw63gda";
   };
 
   buildInputs = [ python3 yosys ];