diff --git a/bot/requirements.txt b/bot/requirements.txt
index 996f96d25..59204bd2a 100644
--- a/bot/requirements.txt
+++ b/bot/requirements.txt
@@ -3,6 +3,6 @@ google-cloud-storage==1.26.0
 libmozdata==0.1.65
 pytoml==0.1.21
 pytz==2019.3
-pyyaml==5.3
+pyyaml==5.3.1
 tenacity==6.1.0
 zstandard==0.13.0