diff --git a/requirements.txt b/requirements.txt
index 4de4ffd..5818475 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 thumbor==7.0.0a5
 pillow==7.1.0
-tornado==6.0.4
+tornado==6.3.3
 colorful==0.5.4
 opencv-python-headless==4.2.0.32
 opencv-engine==1.0.1