diff --git a/requirements.txt b/requirements.txt
index 9934621..c6d2b28 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ pytz>=2020.4
 RPi.GPIO~=0.7
 rsa>=4.7 # not directly required, pinned by Snyk to avoid a vulnerability
 unicornhatmini~=0.0
+protobuf>=4.25.8 # not directly required, pinned by Snyk to avoid a vulnerability