diff --git a/docs/requirements.txt b/docs/requirements.txt
old mode 100755
new mode 100644
index 1a6343f..870aa09
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,7 +1,7 @@
 # This file is used to setup env
 # to generate documentation.
 
-sphinx>=4.4.0,<4.5.0
+sphinx>=4.4.0,<5.1.0
 sphinx-autodoc-typehints>=1.17.0,<1.18.0
 sphinxcontrib-apidoc>=0.3.0
 furo>=2022.1.2