diff --git a/community/hierarchical_configuration/requirements/install.txt b/community/hierarchical_configuration/requirements/install.txt
index 299dfa0f7..288b4c133 100644
--- a/community/hierarchical_configuration/requirements/install.txt
+++ b/community/hierarchical_configuration/requirements/install.txt
@@ -1,3 +1,4 @@
 google-api-python-client
 google-cloud
 
+protobuf>=6.33.5 # not directly required, pinned by Snyk to avoid a vulnerability