diff --git a/pyproject.toml b/pyproject.toml
index 3f94401..e01006f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ dependencies = [
   "annotated-types==0.7.0",
   "anyio==4.9.0",
   "attrs==25.3.0",
-  "Authlib==1.6.6",
+  "Authlib==1.6.9",
   "certifi==2025.6.15",
   "cffi==2.0.0",
   "charset-normalizer==3.4.2",