diff --git a/requirements_dev.txt b/requirements_dev.txt
index 273f59b..d004a5b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,5 +5,5 @@ watchdog==0.10.3
 flake8==3.8.4
 coverage==5.3
 cryptography==3.4.6
-Sphinx==3.3.1
+Sphinx==5.3.0
 sphinx-rtd-theme==0.5.0