diff --git a/tutorials/ardu-pi-serial-part-2/beam-requirements.txt b/tutorials/ardu-pi-serial-part-2/beam-requirements.txt
index 88b5acb580..313f53f121 100644
--- a/tutorials/ardu-pi-serial-part-2/beam-requirements.txt
+++ b/tutorials/ardu-pi-serial-part-2/beam-requirements.txt
@@ -7,3 +7,4 @@ google-cloud-core
 google-cloud-pubsub
 google-cloud-storage
 google-api-python-client
+numpy>=1.22.0 # not directly required, pinned by Snyk to avoid a vulnerability