diff --git a/pkgs/development/python-modules/onnxmltools/default.nix b/pkgs/development/python-modules/onnxmltools/default.nix
index 97eaf68254b6..b24537ddcdf3 100644
--- a/pkgs/development/python-modules/onnxmltools/default.nix
+++ b/pkgs/development/python-modules/onnxmltools/default.nix
@@ -16,14 +16,14 @@
 
 buildPythonPackage rec {
   pname = "onnxmltools";
-  version = "1.11.2";
+  version = "1.12.0";
   format = "setuptools";
 
   src = fetchFromGitHub {
     owner = "onnx";
     repo = "onnxmltools";
-    rev = "v${version}";
-    hash = "sha256-uLFAGtCDLdMd0SMoonMXFE0kGHuDpwp6IrIbD0t8l4M=";
+    rev = "refs/tags/${version}";
+    hash = "sha256-/UKGo56riLnATcn7kA++QoFkkILVGYBwqRZZ+PYB1/0=";
   };
 
   propagatedBuildInputs = [