diff --git a/requirements-optional.txt b/requirements-optional.txt
index 6b8e97b4c5a..805e9cdc7e8 100644
--- a/requirements-optional.txt
+++ b/requirements-optional.txt
@@ -5,7 +5,7 @@ pre-commit==4.0.1
 ruff==0.6.9
 
 # For generating documentation.
-sphinx==8.1.0
+sphinx==8.1.3
 sphinx-autoapi==3.3.2
 
 # For 'manage' interactive shell