diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index b307791..ff1dc80 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -16,6 +16,8 @@ jobs:
 
       - run: pip install -r requirements.txt
 
+      - run: mypy --install-types
+
       - name: Build Core
         run: hatch build
         working-directory: ./core