diff --git a/docs/python/inference/api_summary.rst b/docs/python/inference/api_summary.rst
index 4f82e1242d..d6b87808bd 100644
--- a/docs/python/inference/api_summary.rst
+++ b/docs/python/inference/api_summary.rst
@@ -210,7 +210,7 @@ API Details
 
 
 InferenceSession
-----------
+----------------
 
 .. autoclass:: onnxruntime.InferenceSession
     :members:
diff --git a/docs/python/inference/conf.py b/docs/python/inference/conf.py
index 300f6da4c0..ad56d6a465 100644
--- a/docs/python/inference/conf.py
+++ b/docs/python/inference/conf.py
@@ -16,7 +16,7 @@ import onnxruntime
 # -- Project information -----------------------------------------------------
 
 project = "ONNX Runtime"
-copyright = "2018-2021, Microsoft"
+copyright = "2018-2023, Microsoft"
 author = "Microsoft"
 version = onnxruntime.__version__
 release = version
diff --git a/docs/python/requirements.txt b/docs/python/requirements.txt
index 02614db8c3..a6c7290790 100644
--- a/docs/python/requirements.txt
+++ b/docs/python/requirements.txt
@@ -2,7 +2,7 @@ autopep8
 matplotlib
 scikit-learn
 skl2onnx
-sphinx
+sphinx==5.3.0
 sphinx-gallery
 sphinxcontrib.imagesvg
 sphinxcontrib.googleanalytics