diff --git a/requirements.txt b/requirements.txt
index 1396f24..4a48b17 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,5 +6,6 @@
 
 antsibull-docs >= 2.0.0, < 3.0.0
 ansible-pygments==0.1.2
-sphinx==7.4.7
+sphinx==9.0.4
 sphinx-ansible-theme==0.10.4
+sphinx-rtd-theme>=3.1.0rc1