diff --git a/pyproject.toml b/pyproject.toml
index 040babe67..96675bc9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,7 +56,7 @@ sagemaker = [
 ]
 otel = ["opentelemetry-exporter-otlp-proto-http>=1.30.0,<2.0.0"]
 docs = [
-    "sphinx>=5.0.0,<9.0.0",
+    "sphinx>=5.0.0,<10.0.0",
     "sphinx-rtd-theme>=1.0.0,<2.0.0",
     "sphinx-autodoc-typehints>=1.12.0,<4.0.0",
 ]