diff --git a/acp_adapter/server.py b/acp_adapter/server.py
index c5c29c5ad3..2e835afc21 100644
--- a/acp_adapter/server.py
+++ b/acp_adapter/server.py
@@ -12,7 +12,7 @@ import acp
 from acp.schema import (
     AgentCapabilities,
     AuthenticateResponse,
-    AuthMethod,
+    AuthMethodAgent,
     ClientCapabilities,
     EmbeddedResourceContentBlock,
     ForkSessionResponse,
@@ -177,7 +177,7 @@ class HermesACPAgent(acp.Agent):
         auth_methods = None
         if provider:
             auth_methods = [
-                AuthMethod(
+                AuthMethodAgent(
                     id=provider,
                     name=f"{provider} runtime credentials",
                     description=f"Authenticate Hermes using the currently configured {provider} runtime credentials.",
diff --git a/pyproject.toml b/pyproject.toml
index a36af37839..14a35607ab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -61,7 +61,7 @@ honcho = ["honcho-ai>=2.0.1,<3"]
 mcp = ["mcp>=1.2.0,<2"]
 homeassistant = ["aiohttp>=3.9.0,<4"]
 sms = ["aiohttp>=3.9.0,<4"]
-acp = ["agent-client-protocol>=0.8.1,<0.9"]
+acp = ["agent-client-protocol>=0.9.0,<1.0"]
 dingtalk = ["dingtalk-stream>=0.1.0,<1"]
 feishu = ["lark-oapi>=1.5.3,<2"]
 rl = [