diff --git a/pyproject.toml b/pyproject.toml
index 998fc2c48..319ffabab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -89,7 +89,7 @@ optional-dependencies.dev = [
     # use it to lint shell commands in GitHub workflow files.
     "shellcheck-py==0.10.0.1",
     "shfmt-py==3.7.0.1",
-    "sphinx==8.0.2",
+    "sphinx==8.1.0",
     "sphinx-copybutton==0.5.2",
     "sphinx-paramlinks==0.6",
     "sphinx-substitution-extensions==2024.8.6",