diff --git a/tools/requirements.txt b/tools/requirements.txt
index 9275c50..e0e16e1 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -17,7 +17,7 @@ pillow<=11.2.1
 pyparsing<=3.2.3
 python-dateutil<=2.9.0.post0
 six<=1.17.0
-tornado<=6.5.1
+tornado<=6.5.3
 scikit-learn<=1.6.1
 joblib<=1.5.1
 scipy<=1.15.2