diff --git a/setup.py b/setup.py
index 6b146c6..6858851 100644
--- a/setup.py
+++ b/setup.py
@@ -82,7 +82,7 @@
             "mypy==v1.8.0 ; python_version>='3.8'",
             # Docs.
             "Sphinx==7.2.5 ; python_version>='3.9'",
-            "sphinx-autobuild==2021.3.14 ; python_version>='3.9'",
+            "sphinx-autobuild==2024.4.16 ; python_version>='3.9'",
             "sphinx-rtd-theme==2.0.0 ; python_version>='3.9'",
         ]
     },