diff --git a/poetry.lock b/poetry.lock
index e3a652fa..38559e70 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.1.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.2.1 and should not be changed by hand.
 
 [[package]]
 name = "annotated-types"
@@ -54,14 +54,14 @@ typing-extensions = {version = ">=4.0.0", markers = "python_version < \"3.11\""}
 
 [[package]]
 name = "authlib"
-version = "1.6.0"
+version = "1.6.6"
 description = "The ultimate Python library in building OAuth and OpenID Connect servers and clients."
 optional = false
 python-versions = ">=3.9"
 groups = ["main", "dev"]
 files = [
-    {file = "authlib-1.6.0-py2.py3-none-any.whl", hash = "sha256:91685589498f79e8655e8a8947431ad6288831d643f11c55c2143ffcc738048d"},
-    {file = "authlib-1.6.0.tar.gz", hash = "sha256:4367d32031b7af175ad3a323d571dc7257b7099d55978087ceae4a0d88cd3210"},
+    {file = "authlib-1.6.6-py2.py3-none-any.whl", hash = "sha256:7d9e9bc535c13974313a87f53e8430eb6ea3d1cf6ae4f6efcd793f2e949143fd"},
+    {file = "authlib-1.6.6.tar.gz", hash = "sha256:45770e8e056d0f283451d9996fbb59b70d45722b45d854d58f32878d0a40c38e"},
 ]
 
 [package.dependencies]
@@ -1515,4 +1515,4 @@ gcp = ["google-auth", "requests"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.9"
-content-hash = "84dda1a6ae0a8491ec9f64e6500480e7ef2e177812a624e388127f354c8e844c"
+content-hash = "ee8b3e3fed280d91639f767090fd5aa854848dce9023184f4276ba5320f2e7ff"
diff --git a/pyproject.toml b/pyproject.toml
index 087b5703..4da8e8a9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ types-authlib = "^1.5.0.20250516"
 types-pyyaml = "^6.0.12.20250516"
 mcp = { version = "^1.0", python = ">=3.10" }
 griffe = "^1.7.3"
-authlib = "^1.5.2"
+authlib = "^1.6.6"
 
 [tool.poetry.group.lint.dependencies]
 ruff = "^0.11.10"