diff --git a/requirements.txt b/requirements.txt
index 208f48d5..9c79cc20 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 requests
 google-api-python-client
+protobuf>=5.29.6 # not directly required, pinned by Snyk to avoid a vulnerability