diff --git a/pyproject.toml b/pyproject.toml
index b8eafd76..7901d131 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ docs = [
     "myst_parser==4.0.1",
     "nbsphinx==0.9.8",
     "sphinx-copybutton==0.5.2",
-    "sphinx==8.1.3",
+    "sphinx==9.1.0",
 ]
 dev = ["pre-commit>=2.12.1", "typing_extensions; python_version < '3.11'"]
 tests = ["moto==5.1.19", "pytest-cov==7.0.0", "pytest==9.0.2"]