diff --git a/requirements.txt b/requirements.txt
index 29a5658..a10af87 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,4 +16,4 @@ setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerabil
 slack_sdk==3.21.3
 Werkzeug~=3.0.1
 certifi>=2022.12.7 # not directly required, pinned by Snyk to avoid a vulnerability
-tornado==6.1 # has to stay fixed until python-telegram-bot is upgraded
+tornado==6.3.3 # has to stay fixed until python-telegram-bot is upgraded