diff --git a/requirements-dev.txt b/requirements-dev.txt
index b387622..31f7257 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ pytest==6.2.1
 pytest-cov==2.10.1
 pytest-mock==3.4.0
 coverage==5.3.1
-sphinx==3.4.1
+sphinx==3.4.3
 pep257==0.7.0
 aiohttp-session==2.9.0
 aiopg[sa]==1.1.0