diff --git a/pyproject.toml b/pyproject.toml
index 27218b97..8a4cf2e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -71,7 +71,7 @@ optional-dependencies.dev = [
     "sphinx-pyproject==0.3.0",
     "sphinx-substitution-extensions==2025.11.17",
     "sphinxcontrib-spelling==8.0.2",
-    "sybil==9.2.0",
+    "sybil==9.3.0",
     "types-requests==2.32.4.20250913",
     "vulture==2.14",
     "vws-python-mock==2025.3.10.1",