diff --git a/docs/docs/requirements.txt b/docs/docs/requirements.txt
index 0e94d72ed..19ec4e070 100644
--- a/docs/docs/requirements.txt
+++ b/docs/docs/requirements.txt
@@ -36,6 +36,6 @@ sphinxcontrib-jquery==2.0.0
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
-tornado==6.2
+tornado==6.4.2
 uc-micro-py==1.0.1
 urllib3==1.26.14