diff --git a/.github/workflows/python-check.yml b/.github/workflows/python-check.yml
index 9b7dabb..893a7ba 100644
--- a/.github/workflows/python-check.yml
+++ b/.github/workflows/python-check.yml
@@ -13,7 +13,7 @@ jobs:
 
     - uses: actions/setup-python@v2
     - name: Install Ruff and Mypy
-      run: pip install ruff
+      run: pip install ruff mypy
 
     - name: Ruff check
       run: |