diff --git a/requirements.txt b/requirements.txt
index 5a5a51b65..57ed0b59f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,5 @@
-docutils<0.18
-sphinx-tabs
-sphinx-copybutton
\ No newline at end of file
+docutils==0.16
+sphinx>=4.3.0
+sphinx-copybutton
+sphinx-rtd-theme>=0.5.1
+sphinx-tabs
\ No newline at end of file