diff --git a/docs-requirements.txt b/docs-requirements.txt
index c095897..5ee361c 100644
--- a/docs-requirements.txt
+++ b/docs-requirements.txt
@@ -294,9 +294,9 @@ soupsieve==2.6 \
     --hash=sha256:e2e68417777af359ec65daac1057404a3c8a5455bb8abc36f1a9866ab1a51abb \
     --hash=sha256:e72c4ff06e4fb6e4b5a9f0f55fe6e81514581fca1515028625d0f299c602ccc9
     # via beautifulsoup4
-sphinx==8.0.2 \
-    --hash=sha256:0cce1ddcc4fd3532cf1dd283bc7d886758362c5c1de6598696579ce96d8ffa5b \
-    --hash=sha256:56173572ae6c1b9a38911786e206a110c9749116745873feae4f9ce88e59391d
+sphinx==8.1.3 \
+    --hash=sha256:09719015511837b76bf6e03e42eb7595ac8c2e41eeb9c29c5b755c6b677992a2 \
+    --hash=sha256:43c1911eecb0d3e161ad78611bc905d1ad0e523e4ddc202a58a821773dc4c927
     # via
     #   furo
     #   phantom-types (pyproject.toml)