diff --git a/metagpt/config.py b/metagpt/config.py
index d6e6d8b88..5f2be971a 100644
--- a/metagpt/config.py
+++ b/metagpt/config.py
@@ -76,7 +76,7 @@ class Config(metaclass=Singleton):
         self.openai_api_type = self._get("OPENAI_API_TYPE")
         self.openai_api_version = self._get("OPENAI_API_VERSION")
         self.openai_api_rpm = self._get("RPM", 3)
-        self.openai_api_model = self._get("OPENAI_API_MODEL", "gpt-4")
+        self.openai_api_model = self._get("OPENAI_API_MODEL", "gpt-4-1106-preview")
         self.max_tokens_rsp = self._get("MAX_TOKENS", 2048)
         self.deployment_name = self._get("DEPLOYMENT_NAME")
         self.deployment_id = self._get("DEPLOYMENT_ID")
@@ -139,7 +139,6 @@ class Config(metaclass=Singleton):
                     continue
                 configs.update(yaml_data)
         OPTIONS.set(configs)
-        logger.info(f"Default OpenAI API Model: {self.openai_api_model}")
 
     @staticmethod
     def _get(*args, **kwargs):
diff --git a/metagpt/utils/dependency_file.py b/metagpt/utils/dependency_file.py
index d03444f0e..8a6575e9e 100644
--- a/metagpt/utils/dependency_file.py
+++ b/metagpt/utils/dependency_file.py
@@ -37,7 +37,7 @@ class DependencyFile:
         """Load dependencies from the file asynchronously."""
         if not self._filename.exists():
             return
-        self._dependencies = await aread(self._filename)
+        self._dependencies = json.loads(await aread(self._filename))
 
     @handle_exception
     async def save(self):