diff --git a/requirements/doc.txt b/requirements/doc.txt
index 47652223b66..6c715cf24e4 100644
--- a/requirements/doc.txt
+++ b/requirements/doc.txt
@@ -1,6 +1,6 @@
 aiohttp-theme==0.1.6
 pygments==2.7.2
-sphinx==3.3.0
+sphinx==3.3.1
 sphinxcontrib-asyncio==0.3.0
 sphinxcontrib-blockdiag==2.0.0
 towncrier==19.2.0