diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4b343a5..2942ff2 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -34,7 +34,7 @@ jobs:
         pip install -r requirements-dev.txt
     - name: Typecheck with mypy
       run: |
-        mypy
+        mypy --strict
     - name: Check with ruff
       run: |
         ruff check