diff --git a/pyproject.toml b/pyproject.toml
index d4816e24..6bbfc9d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ dev = [
     "pytest-mock>=3.8.2,<4",
     "python-dotenv>=1.0.0,<2",
     "requests-toolbelt>=1.0.0,<2",
-    "sphinx~=7.0",
+    "sphinx~=9.1",
     "sphinx-rtd-theme>=3.0.0,<4",
     "pytest-vcr>=1.0.2,<2",
     "ty>=0.0.21",