diff --git a/docs/requirements-rtfd.txt b/docs/requirements-rtfd.txt
index d5edb7f..37a53ec 100644
--- a/docs/requirements-rtfd.txt
+++ b/docs/requirements-rtfd.txt
@@ -1,4 +1,4 @@
-tornado==5.0.2
+tornado==6.3.2
 peewee==3.2.2
 requests==2.25.1
 pycurl==7.43.0.1