diff --git a/requirements_dev.txt b/requirements_dev.txt
index 5f82f14..c617c63 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,6 +5,6 @@ flake8==3.9.2; python_version < '3'
 tox==3.24.5
 coverage==5.5; python_version < '3'
 coverage==6.2; python_version >= '3'
-Sphinx==4.3.2; python_version >= '3'
+Sphinx==6.1.3; python_version >= '3'
 pytest==6.2.5; python_version >= '3'
 pytest==4.6.11; python_version < '3'