diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 79f10a2..1e07266 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -20,6 +20,7 @@ jobs:
         uses: ./.github/actions/setup
         with:
           python-version: ${{ matrix.python-version }}
+          optional-dependencies: "development,stubs"
 
       - name: Typecheck
         run: |