diff --git a/pkgs/development/python-modules/logical-unification/default.nix b/pkgs/development/python-modules/logical-unification/default.nix
index 9b802df67289..6e78dc850ed0 100644
--- a/pkgs/development/python-modules/logical-unification/default.nix
+++ b/pkgs/development/python-modules/logical-unification/default.nix
@@ -11,13 +11,13 @@
 
 buildPythonPackage rec {
   pname = "logical-unification";
-  version = "0.4.5";
+  version = "0.4.6";
 
   src = fetchFromGitHub {
     owner = "pythological";
     repo = "unification";
-    rev = "707cf4a39e27a4a8bf06b7e7dce7223085574e65";
-    hash = "sha256-3wqO0pWWFRQeoGNvbSDdLNYFyjNnv+O++F7+vTBUJoI=";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-uznmlkREFONU1YoI/+mcfb+Yg30NinWvsMxTfHCXzOU=";
   };
 
   propagatedBuildInputs = [