diff --git a/oauth-1.0a.d.ts b/oauth-1.0a.d.ts
index 9569bc1..f142007 100644
--- a/oauth-1.0a.d.ts
+++ b/oauth-1.0a.d.ts
@@ -135,6 +135,7 @@ declare namespace OAuth {
     oauth_version: string;
     oauth_token?: string;
     oauth_body_hash?: string;
+    oauth_verifier?: string;
   }
 
   /**
diff --git a/oauth-1.0a.js b/oauth-1.0a.js
index 5c15dd4..583daac 100644
--- a/oauth-1.0a.js
+++ b/oauth-1.0a.js
@@ -59,7 +59,7 @@ function OAuth(opts) {
  * @param  {Object} key and secret token
  * @return {Object} OAuth Authorized data
  */
-OAuth.prototype.authorize = function(request, token) {
+OAuth.prototype.authorize = function(request, token, verifier) {
     var oauth_data = {
         oauth_consumer_key: this.consumer.key,
         oauth_nonce: this.getNonce(),
@@ -84,6 +84,10 @@ OAuth.prototype.authorize = function(request, token) {
       oauth_data.oauth_body_hash = this.getBodyHash(request, token.secret)
     }
 
+    if(verifier) {
+      oauth_data.oauth_verifier = verifier;
+    }
+
     oauth_data.oauth_signature = this.getSignature(request, token.secret, oauth_data);
 
     return oauth_data;
diff --git a/package-lock.json b/package-lock.json
index d139780..451af2f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -888,9 +888,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.11",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
-      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==",
+      "version": "4.17.15",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+      "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
       "dev": true
     },
     "log-driver": {