diff --git a/.circleci/config.yml b/.circleci/config.yml
index a16b7b69..096b1447 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -29,6 +29,7 @@ jobs:
     # I have no idea why git fails locally otherwise, but...
     - run: git config --global --add safe.directory /tmp/_circleci_local_build_repo
     - checkout
+    - run: pipx run ruff check  # Lint Python code with ruff
     - run: chown -R $(id -nu):$(id -ng) . # another fix for wrong permissions in local builds
 
     - run: bash ./hardware/firmware/box_rp2040/build.sh