diff --git a/pkgs/development/compilers/lobster/default.nix b/pkgs/development/compilers/lobster/default.nix
index f8d31f12cd45..62867f296d72 100644
--- a/pkgs/development/compilers/lobster/default.nix
+++ b/pkgs/development/compilers/lobster/default.nix
@@ -18,13 +18,13 @@
 
 stdenv.mkDerivation rec {
   pname = "lobster";
-  version = "unstable-2020-07-27";
+  version = "unstable-2020-10-04";
 
   src = fetchFromGitHub {
     owner = "aardappel";
     repo = pname;
-    rev = "9d68171494a79c83931426b624a0249a9c51882c";
-    sha256 = "0d4gn71jym662i00rdmynv53ng1lgl81s5lw1sdddgn41wzs28dd";
+    rev = "4c5e78f021ce9d06592fb3a66388e5e31fac1adb";
+    sha256 = "1wnbc8kr1dyfs53nlcxah22ghphmazzrlcj9z47cgkdsj1qfy84x";
   };
 
   nativeBuildInputs = [ cmake ];