diff --git a/requirements.txt b/requirements.txt
index 5b11b4c..db06b95 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ flask>=1.0,<=2.0
 jaeger-client
 protobuf>=3.18.3 # not directly required, pinned by Snyk to avoid a vulnerability
 werkzeug==2.3.7
+tornado>=6.4.2 # not directly required, pinned by Snyk to avoid a vulnerability