diff --git a/.github/workflows/check-python.yml b/.github/workflows/check-python.yml
index ec6f2ce..d29e383 100644
--- a/.github/workflows/check-python.yml
+++ b/.github/workflows/check-python.yml
@@ -1,10 +1,6 @@
 # Source: https://github.com/per1234/.github/blob/main/workflow-templates/check-python.md
 name: Check Python
 
-env:
-  # See: https://github.com/actions/setup-python/tree/main#available-versions-of-python
-  PYTHON_VERSION: "3.9"
-
 # See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
 on:
   push:
@@ -62,7 +58,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v6
         with:
-          python-version: ${{ env.PYTHON_VERSION }}
+          python-version-file: pyproject.toml
 
       - name: Check formatting
         uses: psf/black@stable