diff --git a/src/adapter/base.js b/src/adapter/base.js
index 49ec7a7..53258c0 100644
--- a/src/adapter/base.js
+++ b/src/adapter/base.js
@@ -2,50 +2,50 @@ const log4js = require('log4js');
 const _logger = Symbol('_logger');
 
 module.exports = class {
-    constructor(config) {
-        this[_logger] = {};
-        const logConfig = this.formatConfig(config);
-        this.setLogger(logConfig);
-    }
-
-    trace(...args) {
-        return this[_logger].trace(...args);
-    }
-
-    debug(...args) {
-        return this[_logger].debug(...args);
-    }
-
-    info(...args) {
-        return this[_logger].info(...args);
-    }
-
-    warn(...args) {
-        return this[_logger].warn(...args);
-    }
-
-    error(...args) {
-        return this[_logger].error(...args);
-    }
-
-    /**
-     * log4js configure
-     */
-    configure(config) {
-        return log4js.configure(config);
-    }
-
-    /**
-     * log4js setLogger
-     */
-    setLogger(config, category) {
-        this.configure(config);
-        this[_logger] = log4js.getLogger(category);
-    }
-    getLogger() {
-        return this[_logger];
-    }
-    formatConfig(config) {
-        return config;
-    }
+  constructor(config) {
+    this[_logger] = {};
+    const logConfig = this.formatConfig(config);
+    this.setLogger(logConfig);
+  }
+
+  trace(...args) {
+    return this[_logger].trace(...args);
+  }
+
+  debug(...args) {
+    return this[_logger].debug(...args);
+  }
+
+  info(...args) {
+    return this[_logger].info(...args);
+  }
+
+  warn(...args) {
+    return this[_logger].warn(...args);
+  }
+
+  error(...args) {
+    return this[_logger].error(...args);
+  }
+
+  /**
+   * log4js configure
+   */
+  configure(config) {
+    return log4js.configure(config);
+  }
+
+  /**
+   * log4js setLogger
+   */
+  setLogger(config, category) {
+    this.configure(config);
+    this[_logger] = log4js.getLogger(category);
+  }
+  getLogger() {
+    return this[_logger];
+  }
+  formatConfig(config) {
+    return config;
+  }
 };
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
index a006dcf..6badace 100644
--- a/src/index.js
+++ b/src/index.js
@@ -5,16 +5,16 @@ const FileAdapter = require('./adapter/file');
 const DateFileAdapter = require('./adapter/datefile');
 
 class Logger {
-    constructor(config = {}) {
-        const Handle = config.handle || ConsoleAdapter;
-        delete config.handle;
+  constructor(config = {}) {
+    const Handle = config.handle || ConsoleAdapter;
+    delete config.handle;
 
-        this._logger = new Handle(config);
-        ['trace', 'debug', 'info', 'warn', 'error', 'getLogger'].forEach(level => {
-            assert(this._logger[level], `adapter function ${level} not exist!`);
-            this[level] = this._logger[level].bind(this._logger);
-        });
-    }
+    this._logger = new Handle(config);
+    ['trace', 'debug', 'info', 'warn', 'error', 'getLogger'].forEach(level => {
+      assert(this._logger[level], `adapter function ${level} not exist!`);
+      this[level] = this._logger[level].bind(this._logger);
+    });
+  }
 }
 
 Logger.Basic = BasicAdapter;