diff --git a/requirements.txt b/requirements.txt
index 6480aec..0adac23 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ bs4
 lxml
 google-api-python-client
 requests
+filelock>=3.20.1 # not directly required, pinned by Snyk to avoid a vulnerability