diff --git a/.coveralls.yml b/.coveralls.yml
index 1b8c0423..650954be 100644
--- a/.coveralls.yml
+++ b/.coveralls.yml
@@ -1 +1 @@
-repo_token: RTm43Y7KTsi2AkDnpxTr3UvNcJZBKSXid
+repo_token: JJS0p6rdrOP93s5lMebbwyAx2Z2L0PabA
diff --git a/README.md b/README.md
index c2556020..d54b9e5b 100644
--- a/README.md
+++ b/README.md
@@ -23,5 +23,8 @@ Cobra是一款**源代码安全审计**工具，支持检测多种开发语言
 [![report01](https://raw.githubusercontent.com/whaleshark-team/cobra/master/docs/report_01.jpg)](https://whaleshark-team.github.io/cobra/api)
 [![report02](https://raw.githubusercontent.com/whaleshark-team/cobra/master/docs/report_02.jpg)](https://whaleshark-team.github.io/cobra/api)
 
+## Contributors（贡献者）
+项目由[Feei](https://github.com/FeeiCN)发起并主导，核心开发者[LiGhT1EsS](https://github.com/LiGhT1EsS)、[BlBana](https://github.com/BlBana)、[40huo](https://github.com/40huo)、[braveghz](https://github.com/braveghz)，也感谢其他[贡献者](https://github.com/WhaleShark-Team/cobra/graphs/contributors)，欢迎提交PR。
+
 ## Links（链接）
 - [Cobra文档](https://whaleshark-team.github.io/cobra/)
diff --git a/cobra/config.py b/cobra/config.py
index 33fbfed6..647f55d4 100644
--- a/cobra/config.py
+++ b/cobra/config.py
@@ -60,14 +60,14 @@ class Config(object):
     def __init__(self, level1=None, level2=None):
         self.level1 = level1
         self.level2 = level2
-        if level1 is None and level2 is None:
+        if self.level1 is None and self.level2 is None:
             return
         config = ConfigParser()
 
         config.read(config_path)
         value = None
         try:
-            value = config.get(level1, level2)
+            value = config.get(self.level1, self.level2)
         except Exception as e:
             traceback.print_exc()
             logger.critical("./configs file configure failed. {u}\nError: {e}".format(u='http://cobra.feei.cn/config', e=e.message))
diff --git a/cobra/engine.py b/cobra/engine.py
index 93f94335..b561614a 100644
--- a/cobra/engine.py
+++ b/cobra/engine.py
@@ -569,7 +569,6 @@ def scan(self):
         :return: is_vulnerability, code
         """
         self.method = 0
-        self.code_content = self.code_content
         if len(self.code_content) > 512:
             self.code_content = self.code_content[:500]
         self.status = self.status_init