diff --git a/requirements/doc.txt b/requirements/doc.txt
index deb704b08dd..66f2ab5b0bc 100644
--- a/requirements/doc.txt
+++ b/requirements/doc.txt
@@ -1,6 +1,6 @@
 aiohttp-theme==0.1.6
 pygments==2.8.0
-sphinx==3.4.3
+sphinx==3.5.0
 sphinxcontrib-asyncio==0.3.0
 sphinxcontrib-blockdiag==2.0.0
 towncrier==19.2.0