diff --git a/requirements.txt b/requirements.txt
index 3c699b5..4887835 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,3 +8,4 @@ openai==0.26.5
 streamlit==1.18.1
 streamlit-pills==0.3.0
 youtube-transcript-api==0.5.0
+validators>=0.21.0 # not directly required, pinned by Snyk to avoid a vulnerability