diff --git a/requirements_dev.txt b/requirements_dev.txt
index 35e787d..81c62d1 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -9,7 +9,7 @@ pip==20.0.2
 plumbum==1.6.8
 pytest==5.3.5
 PyYAML==5.3
-Sphinx==2.4.1
+Sphinx==4.3.0
 tox==3.14.3
 wheel==0.34.2
 watchdog==0.10.2