diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bf0a31f1e..14509e815 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -88,6 +88,7 @@ jobs:
             sudo installer -pkg SDRplay_RSP_API-MacOSX-2.13.2.pkg -target /  
           
             pip install pyaudio
+            pip install pillow
           fi
           pip install twine setuptools pytest pytest-xvfb pytest-cov pytest-faulthandler six appdirs packaging pyinstaller
           python -c "import tempfile, os; open(os.path.join(tempfile.gettempdir(), 'urh_releasing'), 'w').close()"