diff --git a/requirements_dev.txt b/requirements_dev.txt
index e12262a..a1fb84a 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -7,6 +7,6 @@ flake8==3.9.2
 tox==3.23.1
 tox-pyenv==1.1.0
 coverage==5.5
-Sphinx==3.2.0
+Sphinx==7.3.7
 cryptography==3.3.2 # pyup: <3.4 # 3.4 drops Python 2.7 support
 PyYAML==5.4.1