diff --git a/docs/requirements.txt b/docs/requirements.txt
index 40d0c13..c6e98b2 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,4 +3,4 @@
 myst-parser>=5.1.0,<6
 sphinx>=9,<10
 sphinx-autoapi>=3.8.1,<4
-sphinx-rtd-theme>=3,<4
+sphinx-rtd-theme>=3.1.0,<4