diff --git a/.github/workflows/poetry-test.yml b/.github/workflows/poetry-test.yml
index 0a73d32..ce7eb07 100644
--- a/.github/workflows/poetry-test.yml
+++ b/.github/workflows/poetry-test.yml
@@ -59,7 +59,7 @@ jobs:
         run: |
           poetry config virtualenvs.in-project true
           poetry install
-          poetry run pip install -U pip, ffmpeg
+          poetry run pip install -U pip ffmpeg
       #----------------------------------------------
       #              run test suite
       #----------------------------------------------