diff --git a/pkgs/applications/science/logic/symbiyosys/default.nix b/pkgs/applications/science/logic/symbiyosys/default.nix
index ed66c77dcabf..8e100716c874 100644
--- a/pkgs/applications/science/logic/symbiyosys/default.nix
+++ b/pkgs/applications/science/logic/symbiyosys/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation {
   pname = "symbiyosys";
-  version = "2019.08.13";
+  version = "2019.10.11";
 
   src = fetchFromGitHub {
     owner  = "yosyshq";
     repo   = "symbiyosys";
-    rev    = "9cb542ac7a310b3dfa626349db53bed6236b670c";
-    sha256 = "0c7nz740738ybk33zzlfl00cq86n31wvra8pqqkpl4ygxnwca1d6";
+    rev    = "23f89011b678daa9da406d4f45f790e45f8f68ca";
+    sha256 = "01596yvfj79iywwczjwlb2l9qnh7bsj7jff66jdk1ybjnxf841f0";
   };
 
   buildInputs = [ python3 yosys ];