diff --git a/cozepy/version.py b/cozepy/version.py
index 008d011..51df8f9 100644
--- a/cozepy/version.py
+++ b/cozepy/version.py
@@ -3,7 +3,7 @@
 import sys
 from functools import lru_cache
 
-VERSION = "0.10.2"
+VERSION = "0.10.3"
 
 
 def get_os_version() -> str:
diff --git a/cozepy/workflows/runs/__init__.py b/cozepy/workflows/runs/__init__.py
index a774941..252e1f0 100644
--- a/cozepy/workflows/runs/__init__.py
+++ b/cozepy/workflows/runs/__init__.py
@@ -17,12 +17,12 @@ class WorkflowRunResult(CozeModel):
 
     # Workflow execution result, usually a JSON serialized string. In some scenarios, a
     # string with a non-JSON structure may be returned.
-    data: Optional[str]
+    data: Optional[str] = ""
 
     # Execution ID of asynchronous execution. Only returned when the workflow is executed
     # asynchronously (is_async=true). You can use execute_id to call the Query Workflow
     # Asynchronous Execution Result API to obtain the final execution result of the workflow.
-    execute_id: Optional[str]
+    execute_id: Optional[str] = ""
 
 
 class WorkflowEventType(str, Enum):
diff --git a/cozepy/workflows/runs/run_histories/__init__.py b/cozepy/workflows/runs/run_histories/__init__.py
index 421ea26..5c50c9f 100644
--- a/cozepy/workflows/runs/run_histories/__init__.py
+++ b/cozepy/workflows/runs/run_histories/__init__.py
@@ -68,7 +68,7 @@ class WorkflowRunHistory(CozeModel):
     error_code: int
 
     # Status message. You can get detailed error information when the API call fails.
-    error_message: Optional[str]
+    error_message: Optional[str] = ""
 
     # Workflow trial run debugging page. Visit this page to view the running results, input
     # and output information of each workflow node.
diff --git a/pyproject.toml b/pyproject.toml
index 2c795ba..501ac84 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "cozepy"
-version = "0.10.2"
+version = "0.10.3"
 description = "OpenAPI SDK for Coze(coze.com/coze.cn)"
 authors = ["chyroc <chyroc@bytedance.com>"]
 readme = "README.md"