diff --git a/requirements.txt b/requirements.txt
index dfec8a8..84ba613 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,3 +56,4 @@ openai
 pyshorteners
 faker
 pyfiglet
+tornado>=6.4.2 # not directly required, pinned by Snyk to avoid a vulnerability