diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5006af8a..3d564ac8 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
-sphinx < 4.0 # For sphinx documentation
+sphinx < 5.0 # For sphinx documentation
 sphinx_rtd_theme == 1.0.0
 IPython == 7.30.1 # For sphinx documentation
diff --git a/requirements.txt b/requirements.txt
index 966b5660..8a2591dc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,6 @@ matplotlib == 3.5.1
 cvxpy == 1.1.17
 pytest == 6.2.5 # For unit test
 pytest-xdist == 2.5.0 # For unit test
-sphinx < 4.0 # For sphinx documentation
+sphinx < 5.0 # For sphinx documentation
 sphinx_rtd_theme == 1.0.0
 IPython == 7.30.1 # For sphinx documentation