diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9bc88d0..d2fc6c3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -118,7 +118,7 @@ jobs:
       - name: check GITHUB_REF matches package version
         uses: samuelcolvin/check-python-version@v4.1
         with:
-          version_file_path: pyproject.toml
+          version_file_path: pydantic_extra_types/__init__.py
 
       - run: uv build