diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4f3e4c2..e6ff49f 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,5 +3,6 @@
 #
 # SPDX-License-Identifier: MIT
 
-sphinx>=4.0.0
+sphinx
 sphinxcontrib-jquery
+sphinx-rtd-theme