diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 000000000..623e6e556
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,14 @@
+# Security Policy
+
+## Supported Versions
+
+| Version | Supported          |
+|---------|--------------------|
+ | 7.x     | :x:                |
+ | 6.x     | :x:                |
+| < 6.x   | :x:                |
+
+
+## Reporting a Vulnerability
+
+If you have any vulnerability reports, please contact alexanderwu@deepwisdom.ai .
\ No newline at end of file
diff --git a/config/config2.example.yaml b/config/config2.example.yaml
index a17d174b3..3a5cc3585 100644
--- a/config/config2.example.yaml
+++ b/config/config2.example.yaml
@@ -3,7 +3,6 @@ llm:
   base_url: "YOUR_BASE_URL"
   api_key: "YOUR_API_KEY"
   model: "gpt-4-turbo-preview"  # or gpt-3.5-turbo-1106 / gpt-4-1106-preview
-  repair_llm_output: true  # when the output is not a valid json, try to repair it
   proxy: "YOUR_PROXY"  # for LLM API requests
   pricing_plan: "" # Optional. If invalid, it will be automatically filled in with the value of the `model`.
   # Azure-exclusive pricing plan mappings：
@@ -13,6 +12,8 @@ llm:
   # - gpt-4 8k: "gpt-4"
   # See for more: https://azure.microsoft.com/en-us/pricing/details/cognitive-services/openai-service/
 
+repair_llm_output: true  # when the output is not a valid json, try to repair it
+
 proxy: "YOUR_PROXY"  # for tools like requests, playwright, selenium, etc.
 
 search:
diff --git a/examples/debate.py b/examples/debate.py
index 72ab8796d..56df16b4f 100644
--- a/examples/debate.py
+++ b/examples/debate.py
@@ -5,6 +5,7 @@ Author: garylin2099
 @Modified By: mashenquan, 2023-11-1. In accordance with Chapter 2.1.3 of RFC 116, modify the data type of the `send_to`
         value of the `Message` object; modify the argument type of `get_by_actions`.
 """
+
 import asyncio
 import platform
 from typing import Any
@@ -105,4 +106,4 @@ def main(idea: str, investment: float = 3.0, n_round: int = 10):
 
 
 if __name__ == "__main__":
-    fire.Fire(main)
+    fire.Fire(main)  # run as python debate.py --idea="TOPIC" --investment=3.0 --n_round=5
diff --git a/examples/search_with_specific_engine.py b/examples/search_with_specific_engine.py
index 97b1378ee..1eee762d5 100644
--- a/examples/search_with_specific_engine.py
+++ b/examples/search_with_specific_engine.py
@@ -4,21 +4,17 @@
 """
 import asyncio
 
+from metagpt.config2 import Config
 from metagpt.roles import Searcher
-from metagpt.tools.search_engine import SearchEngine, SearchEngineType
+from metagpt.tools.search_engine import SearchEngine
 
 
 async def main():
     question = "What are the most interesting human facts?"
-    kwargs = {"api_key": "", "cse_id": "", "proxy": None}
-    # Serper API
-    # await Searcher(search_engine=SearchEngine(engine=SearchEngineType.SERPER_GOOGLE, **kwargs)).run(question)
-    # SerpAPI
-    # await Searcher(search_engine=SearchEngine(engine=SearchEngineType.SERPAPI_GOOGLE, **kwargs)).run(question)
-    # Google API
-    # await Searcher(search_engine=SearchEngine(engine=SearchEngineType.DIRECT_GOOGLE, **kwargs)).run(question)
-    # DDG API
-    await Searcher(search_engine=SearchEngine(engine=SearchEngineType.DUCK_DUCK_GO, **kwargs)).run(question)
+
+    search = Config.default().search
+    kwargs = {"api_key": search.api_key, "cse_id": search.cse_id, "proxy": None}
+    await Searcher(search_engine=SearchEngine(engine=search.api_type, **kwargs)).run(question)
 
 
 if __name__ == "__main__":