diff --git a/python3/requirements.txt b/python3/requirements.txt
index d7b6c42f..e9adc1d9 100644
--- a/python3/requirements.txt
+++ b/python3/requirements.txt
@@ -2,3 +2,4 @@ dotenv
 twilio
 yagmail
 git+https://github.com/charlierguo/gmail
+certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability