diff --git a/requirements.txt b/requirements.txt
index 76f21dc..e2f3133 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 sphinx>=5
-sphinx-rtd-theme
+sphinx-rtd-theme==1.2.0rc1
 sphinx-reredirects
 robotpy-sphinx-plugin
 sphinx-inline-tabs