diff --git a/README.md b/README.md
index 6a78a6c55..9c88c92a1 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,10 @@ # MetaGPT: The Multi-Agent Framework
 <p align="center">Software Company Multi-Role Schematic (Gradually Implementing)</p>
 
 ## News
-- Dec 15: [v0.5.0](https://github.com/geekan/MetaGPT/releases/tag/v0.5.0) is released! We introduce **incremental development**, facilitating agents to build up larger projects on top of their previous efforts or existing codebase. We also launch a whole collection of important features, including **multilingual support** (experimental), multiple **programming languages support** (experimental), **incremental development** (experimental), CLI support, pip support, enhanced code review, documentation mechanism, and optimized messaging mechanism!
+🚀 Jan 03: Here comes [v0.6.0](https://github.com/geekan/MetaGPT/releases/tag/v0.6.0)! In this version, we added serialization and deserialization of important objects and enabled breakpoint recovery. We upgraded OpenAI package to v1.6.0 and supported Gemini, ZhipuAI, Ollama, OpenLLM, etc. Moreover, we provided extremely simple examples where you need only 7 lines to implement a general election [debate](https://github.com/geekan/MetaGPT/blob/main/examples/debate_simple.py). Check out more details [here](https://github.com/geekan/MetaGPT/releases/tag/v0.6.0)!
+
+
+🚀 Dec 15: [v0.5.0](https://github.com/geekan/MetaGPT/releases/tag/v0.5.0) is released! We introduced **incremental development**, facilitating agents to build up larger projects on top of their previous efforts or existing codebase. We also launched a whole collection of important features, including **multilingual support** (experimental), multiple **programming languages support** (experimental), **incremental development** (experimental), CLI support, pip support, enhanced code review, documentation mechanism, and optimized messaging mechanism!
 
 ## Install
 
diff --git a/config/config.yaml b/config/config.yaml
index 240814bf3..6dff55b4e 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -15,6 +15,7 @@ OPENAI_API_MODEL: "gpt-4-1106-preview"
 MAX_TOKENS: 4096
 RPM: 10
 TIMEOUT: 60 # Timeout for llm invocation
+#DEFAULT_PROVIDER: openai
 
 #### if Spark
 #SPARK_APPID : "YOUR_APPID"
diff --git a/metagpt/config.py b/metagpt/config.py
index eb3636c9a..d633c7d28 100644
--- a/metagpt/config.py
+++ b/metagpt/config.py
@@ -50,6 +50,9 @@ class LLMProviderEnum(Enum):
     AZURE_OPENAI = "azure_openai"
     OLLAMA = "ollama"
 
+    def __missing__(self, key):
+        return self.OPENAI
+
 
 class Config(metaclass=Singleton):
     """
@@ -108,6 +111,11 @@ class Config(metaclass=Singleton):
             if v:
                 provider = k
                 break
+        if provider is None:
+            if self.DEFAULT_PROVIDER:
+                provider = LLMProviderEnum(self.DEFAULT_PROVIDER)
+            else:
+                raise NotConfiguredException("You should config a LLM configuration first")
 
         if provider is LLMProviderEnum.GEMINI and not require_python_version(req_version=(3, 10)):
             warnings.warn("Use Gemini requires Python >= 3.10")
@@ -117,7 +125,6 @@ class Config(metaclass=Singleton):
         if provider:
             logger.info(f"API: {provider}")
             return provider
-        raise NotConfiguredException("You should config a LLM configuration first")
 
     def get_model_name(self, provider=None) -> str:
         provider = provider or self.get_default_llm_provider_enum()
diff --git a/requirements.txt b/requirements.txt
index 9c90034cb..0a54236f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ pandas==2.0.3
 pydantic==2.5.3
 #pygame==2.1.3
 #pymilvus==2.2.8
-pytest==7.2.2
+# pytest==7.2.2 # test extras require
 python_docx==0.8.11
 PyYAML==6.0.1
 # sentence_transformers==2.2.2
@@ -38,7 +38,7 @@ typing-inspect==0.8.0
 typing_extensions==4.9.0
 libcst==1.0.1
 qdrant-client==1.7.0
-pytest-mock==3.11.1
+# pytest-mock==3.11.1  # test extras require
 # open-interpreter==0.1.7; python_version>"3.9" # Conflict with openai 1.x
 ta==0.10.2
 semantic-kernel==0.4.3.dev0
@@ -57,5 +57,5 @@ gitignore-parser==0.1.9
 websockets~=12.0
 networkx~=3.2.1
 google-generativeai==0.3.2
-playwright==1.40.0
+# playwright==1.40.0  # playwright extras require
 anytree
diff --git a/setup.py b/setup.py
index a81be6115..ae0b0d8aa 100644
--- a/setup.py
+++ b/setup.py
@@ -56,7 +56,7 @@ extras_require["dev"] = (["pylint~=3.0.3", "black~=23.3.0", "isort~=5.12.0", "pr
 
 setup(
     name="metagpt",
-    version="0.5.2",
+    version="0.6.0",
     description="The Multi-Agent Framework",
     long_description=long_description,
     long_description_content_type="text/markdown",