diff --git a/pkgs/applications/science/logic/ott/default.nix b/pkgs/applications/science/logic/ott/default.nix
index 854a62a5538d..fa7c3dd5e95f 100644
--- a/pkgs/applications/science/logic/ott/default.nix
+++ b/pkgs/applications/science/logic/ott/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "ott";
-  version = "0.29";
+  version = "0.30";
 
   src = fetchFromGitHub {
     owner = "ott-lang";
     repo = "ott";
     rev = version;
-    sha256 = "0saznk2mjbhp3j57imy2p2j0938026bw5m5gqbj59vcvk1rwwl22";
+    sha256 = "16bxfnm30z94x36vr8vs6zd6fj55vnb7aypjl6hf7clk42040brc";
   };
 
   nativeBuildInputs = [ pkgconfig ];