diff --git a/docs/requirements.txt b/docs/requirements.txt
index 9b3be53e..ab85b6b0 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 sphinx 
 sphinx-autobuild
-sphinx-rtd-theme 
+sphinx-rtd-theme==1.2.0 
 myst-parser