diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 23b9c5d..aec4ffe 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -27,6 +27,7 @@ jobs:
         setuptools
         pyinstaller
         requests
+        filelock
 
     - name: Optional dependencies (WebView)
       run: pip3 install --upgrade pywebview