diff --git a/lib/BootBot.js b/lib/BootBot.js
index 9808bb8..92493db 100644
--- a/lib/BootBot.js
+++ b/lib/BootBot.js
@@ -14,6 +14,7 @@ class BootBot extends EventEmitter {
     if (!options || (options && (!options.accessToken || !options.verifyToken || !options.appSecret))) {
       throw new Error('You need to specify an accessToken, verifyToken and appSecret');
     }
+    this._options = options
     this.accessToken = options.accessToken;
     this.verifyToken = options.verifyToken;
     this.appSecret = options.appSecret;
@@ -21,13 +22,37 @@ class BootBot extends EventEmitter {
     this.app = express();
     this.webhook = options.webhook || '/webhook';
     this.webhook = this.webhook.charAt(0) !== '/' ? `/${this.webhook}` : this.webhook;
-    this.app.use(bodyParser.json({ verify: this._verifyRequestSignature.bind(this) }));
     this._hearMap = [];
     this._conversations = [];
   }
-
+  setBeforeMiddlewares( beforeMiddlewares ){
+    if( !( beforeMiddlewares instanceof Array ) ){
+      throw new Error( 'Paremeter in setBeforeMiddlewares() must be an array of middlewares' )
+    }else if( !beforeMiddlewares || !beforeMiddlewares.length ){
+      return
+    }
+    beforeMiddlewares.forEach( middleware => {
+      this.app.use( middleware )
+    })
+  }
+  setAfterMiddlewares( afterMiddlewares ){
+    if( !( afterMiddlewares instanceof Array ) ){
+      throw new Error( 'Paremeter in setAfterMiddlewares() must be an array of middlewares' )
+    }else if( !afterMiddlewares || !afterMiddlewares.length ){
+      return
+    }
+    afterMiddlewares.forEach( middleware => {
+      this.app.use( middleware )
+    })
+  }
   start(port) {
+    // set middlewares
+    this.setBeforeMiddlewares( this._options.beforeMiddlewares || [] )
+    this.app.use(bodyParser.json({ verify: this._verifyRequestSignature.bind(this) }));
+    //init webhook
     this._initWebhook();
+    this.setAfterMiddlewares( this._options.afterMiddlewares || [] )
+
     this.app.set('port', port || 3000);
     this.server = this.app.listen(this.app.get('port'), () => {
       const portNum = this.app.get('port');
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..6f9a177
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,654 @@
+{
+  "name": "bootbot",
+  "version": "1.0.14",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "accepts": {
+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.4.tgz",
+      "integrity": "sha1-hiRnWMfdbSGmR0/whKR0DsBesh8=",
+      "requires": {
+        "mime-types": "2.1.17",
+        "negotiator": "0.6.1"
+      }
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "assertion-error": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
+      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
+      "dev": true
+    },
+    "body-parser": {
+      "version": "1.18.2",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.2.tgz",
+      "integrity": "sha1-h2eKGdhLR9hZuDGZvVm84iKxBFQ=",
+      "requires": {
+        "bytes": "3.0.0",
+        "content-type": "1.0.4",
+        "debug": "2.6.9",
+        "depd": "1.1.1",
+        "http-errors": "1.6.2",
+        "iconv-lite": "0.4.19",
+        "on-finished": "2.3.0",
+        "qs": "6.5.1",
+        "raw-body": "2.3.2",
+        "type-is": "1.6.15"
+      }
+    },
+    "bytes": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
+      "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
+    },
+    "chai": {
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-3.5.0.tgz",
+      "integrity": "sha1-TQJjewZ/6Vi9v906QOxW/vc3Mkc=",
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+        "assertion-error": "1.1.0",
+        "deep-eql": "0.1.3",
+        "type-detect": "1.0.0"
+      }
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+      "integrity": "sha1-/UMOiJgy7DU7ms0d4hfBHLPu+HM=",
+      "dev": true
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+      "resolved": "https://registry.npmjs.org/config/-/config-1.29.1.tgz",
+      "integrity": "sha1-FVyfvFqGNhIOnrXBg8ISrdO3/hg=",
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+      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
+    },
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+    },
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