diff --git a/requirements.txt b/requirements.txt
index dbd81424..306ac1e1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,6 +7,6 @@ pytest == 6.2.5 # For unit test
 pytest-xdist == 2.5.0 # For unit test
 mypy == 0.931 # For unit test
 flake8 == 4.0.1 # For unit test
-sphinx == 4.3.2 # For sphinx documentation
+sphinx == 4.4.0 # For sphinx documentation
 sphinx_rtd_theme == 1.0.0
 IPython == 8.0.0 # For sphinx documentation