diff --git a/requirements.txt b/requirements.txt
index ee5358640..f4221c1ad 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -85,7 +85,7 @@ parsedatetime==2.6
 psutil==5.9.0
 
 ## For ndscheduler
-tornado<6
+tornado==6.5.7
 
 ## alembic
 ## Babel