diff --git a/pyproject.toml b/pyproject.toml
index a437fa9ca..8f8b7be9f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "agentscope-runtime"
-version = "1.1.6"
+version = "1.1.6.post1"
 description = "A production-ready runtime framework for agent applications, providing secure sandboxed execution environments and scalable deployment solutions with multi-framework support."
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/src/agentscope_runtime/engine/schemas/agent_schemas.py b/src/agentscope_runtime/engine/schemas/agent_schemas.py
index 9bebec409..6b542796b 100644
--- a/src/agentscope_runtime/engine/schemas/agent_schemas.py
+++ b/src/agentscope_runtime/engine/schemas/agent_schemas.py
@@ -261,6 +261,8 @@ class Error(BaseModel):
 
 
 class Event(BaseModel):
+    model_config = ConfigDict(extra="allow")
+
     sequence_number: Optional[int] = None
     """sequence number of event"""