diff --git a/pyproject.toml b/pyproject.toml
index beae5dbc2..60fd4c935 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -79,7 +79,7 @@ optional-dependencies.dev = [
     "pyyaml==6.0.2",
     "requests-mock-flask==2023.5.14",
     "ruff==0.6.0",
-    "sphinx==7.4.7",
+    "sphinx==8.0.2",
     "sphinx-copybutton==0.5.2",
     "sphinx-paramlinks==0.6",
     "sphinx-substitution-extensions==2024.8.6",