diff --git a/requirements-lock.txt b/requirements-lock.txt
index da5dd14e223f..6e2b3c02945c 100644
--- a/requirements-lock.txt
+++ b/requirements-lock.txt
@@ -414,9 +414,9 @@ soupsieve==2.6 \
     --hash=sha256:e2e68417777af359ec65daac1057404a3c8a5455bb8abc36f1a9866ab1a51abb \
     --hash=sha256:e72c4ff06e4fb6e4b5a9f0f55fe6e81514581fca1515028625d0f299c602ccc9
     # via beautifulsoup4
-sphinx==8.1.3 \
-    --hash=sha256:09719015511837b76bf6e03e42eb7595ac8c2e41eeb9c29c5b755c6b677992a2 \
-    --hash=sha256:43c1911eecb0d3e161ad78611bc905d1ad0e523e4ddc202a58a821773dc4c927
+sphinx==9.1.0 \
+    --hash=sha256:7741722357dd75f8190766926071fed3bdc211c74dd2d7d4df5404da95930ddb \
+    --hash=sha256:c84fdd4e782504495fe4f2c0b3413d6c2bf388589bb352d439b2a3bb99991978
     # via
     #   -r requirements.txt
     #   furo