diff --git a/docs/requirements_docs.txt b/docs/requirements_docs.txt
index b1d97196..4d7c1f9a 100644
--- a/docs/requirements_docs.txt
+++ b/docs/requirements_docs.txt
@@ -95,7 +95,7 @@ threadpoolctl==3.1.0
 tinycss2==1.2.1 
 toml==0.10.2 
 toolz==0.12.0 
-tornado==6.2 
+tornado==6.3.3 
 tqdm==4.64.1 
 traitlets==5.5.0 
 typing-extensions==4.4.0