diff --git a/pkgs/development/python-modules/pytmx/default.nix b/pkgs/development/python-modules/pytmx/default.nix
index e43cd8b06231..0fa38a9a6311 100644
--- a/pkgs/development/python-modules/pytmx/default.nix
+++ b/pkgs/development/python-modules/pytmx/default.nix
@@ -10,7 +10,7 @@
 
 buildPythonPackage rec {
   pname = "pytmx";
-  version = "3.30";
+  version = "3.31";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
@@ -18,8 +18,8 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "bitcraft";
     repo = "PyTMX";
-    rev = version;
-    sha256 = "sha256-d6VPmRdqUO6YhkOYYeXOEcrli/35IFkxK73AcZYHixw=";
+    rev = "v${version}";
+    sha256 = "05v8zv06fymvgv332g48kcing4k4ncy2iwgpy1qmxrpin1avyynx";
   };
 
   propagatedBuildInputs = [