diff --git a/requirements.txt b/requirements.txt
index ca66471..35ae6a4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 #
 sphinx~=8.0
-sphinx-rtd-theme~=3.0
+sphinx-rtd-theme~=3.1
 sphinxcontrib-spelling~=8.0
 sphinx-gallery~=0.20
 myst-parser[linkify]~=4.0