diff --git a/requirements/dev.txt b/requirements/dev.txt
index 786508c76bd1..0957a7dcae5b 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -13,9 +13,9 @@ pickleshare==0.7.5 \
     --hash=sha256:9649af414d74d4df115d5d718f82acb59c9d418196b7b4290ed47a12ce62df56 \
     --hash=sha256:87683d47965c1da65cdacaf31c8441d12b8044cdec9aca500cd78fc2c683afca
 # Sphinx is required by sphinxcontrib-httpdomain
-Sphinx==8.1.3 \
-    --hash=sha256:09719015511837b76bf6e03e42eb7595ac8c2e41eeb9c29c5b755c6b677992a2 \
-    --hash=sha256:43c1911eecb0d3e161ad78611bc905d1ad0e523e4ddc202a58a821773dc4c927
+Sphinx==9.1.0 \
+    --hash=sha256:7741722357dd75f8190766926071fed3bdc211c74dd2d7d4df5404da95930ddb \
+    --hash=sha256:c84fdd4e782504495fe4f2c0b3413d6c2bf388589bb352d439b2a3bb99991978
 # alabaster is required by Sphinx
 alabaster==1.0.0 \
     --hash=sha256:c00dca57bca26fa62a6d7d0a9fcce65f3e026e9bfe33e9c538fd3fbb2144fd9e \