diff --git a/extra/libcbor/doc/source/requirements.txt b/extra/libcbor/doc/source/requirements.txt
index 461bb7e804d2..f2c13c052d12 100644
--- a/extra/libcbor/doc/source/requirements.txt
+++ b/extra/libcbor/doc/source/requirements.txt
@@ -33,7 +33,7 @@ sphinxcontrib-htmlhelp==1.0.3
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.4
-tornado==6.0.4
+tornado==6.3.2
 urllib3==1.25.8
 watchdog==0.10.2
 Werkzeug==0.15.5