diff --git a/setup.py b/setup.py
index 54dbae65..95563549 100644
--- a/setup.py
+++ b/setup.py
@@ -78,7 +78,7 @@
             "mypy==v0.971 ; python_version>='3.6' and python_version<'3.7'",
             "mypy==v1.4.1 ; python_version>='3.7'",
             # Docs.
-            "Sphinx==5.3.0 ; python_version>='3.9'",
+            "Sphinx==7.2.5 ; python_version>='3.9'",
             "sphinx-autobuild==2021.3.14 ; python_version>='3.9'",
             "sphinx-rtd-theme==1.3.0 ; python_version>='3.9'",
         ]