diff --git a/.github/workflows/ci-test.yml b/.github/workflows/ci-test.yml
index ee980496..d3a8b4e0 100644
--- a/.github/workflows/ci-test.yml
+++ b/.github/workflows/ci-test.yml
@@ -71,6 +71,7 @@ jobs:
           PYTHONPATH: /usr/local/lib/python3.10/dist-packages:/usr/lib/python3/dist-packages
         run: |
           sudo pip3 install pytype=="$(grep -E "pytype = " pyproject.toml | grep -Eo "[0-9\.]+")" && \
+            sudo pip3 install -U pyserial && \
             pytype -k gamutrf/ && \
             pytype -k utils/mavlink-api
       - name: Test with pytest