diff --git a/constraints.txt b/constraints.txt
index 2e5c6505..df051733 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -49,7 +49,7 @@ setuptools-scm==9.2.2
 snowballstemmer==3.0.1
 sortedcontainers==2.4.0
 Sphinx==8.1.3
-sphinx-rtd-theme==3.0.2
+sphinx-rtd-theme==3.1.0
 sphinxcontrib-applehelp==2.0.0
 sphinxcontrib-devhelp==2.0.0
 sphinxcontrib-htmlhelp==2.1.0