diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index b8f6150..5e74214 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.13
+          python-version: "3.13"
           architecture: x64
       - name: Checkout
         uses: actions/checkout@v4