diff --git a/.gitignore b/.gitignore
index d48053e..5f148e2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,8 @@ results
 node_modules
 npm-debug.log
 coverage/
+
+package-lock.json
+yarn.lock
+
+.vscode
diff --git a/lib/agent.js b/lib/agent.js
index a51ad59..3a3a6fc 100644
--- a/lib/agent.js
+++ b/lib/agent.js
@@ -1,15 +1,15 @@
 /**
  * refer:
- *   * @atimb "Real keep-alive HTTP agent": https://gist.github.com/2963672
- *   * https://github.com/joyent/node/blob/master/lib/http.js
- *   * https://github.com/joyent/node/blob/master/lib/https.js
- *   * https://github.com/joyent/node/blob/master/lib/_http_agent.js
+ * - @atimb "Real keep-alive HTTP agent": https://gist.github.com/2963672
+ * - https://github.com/nodejs/node/blob/master/lib/http.js
+ * - https://github.com/nodejs/node/blob/master/lib/https.js
+ * - https://github.com/nodejs/node/blob/master/lib/_http_agent.js
  */
 
 'use strict';
 
 const OriginalAgent = require('./_http_agent').Agent;
-const ms = require('humanize-ms');
+const ms = require('ms');
 
 class Agent extends OriginalAgent {
   constructor(options) {
@@ -23,7 +23,7 @@ class Agent extends OriginalAgent {
     if (options.keepAliveTimeout) {
       options.freeSocketKeepAliveTimeout = options.keepAliveTimeout;
     }
-    options.freeSocketKeepAliveTimeout = ms(options.freeSocketKeepAliveTimeout);
+    options.freeSocketKeepAliveTimeout = ms(`${options.freeSocketKeepAliveTimeout}`);
 
     // Sets the socket to timeout after timeout milliseconds of inactivity on the socket.
     // By default is double free socket keepalive timeout.
@@ -34,7 +34,7 @@ class Agent extends OriginalAgent {
         options.timeout = 30000;
       }
     }
-    options.timeout = ms(options.timeout);
+    options.timeout = ms(`${options.timeout}`);
 
     super(options);
 
diff --git a/package.json b/package.json
index 4a722a7..651d15d 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "agentkeepalive"
   ],
   "dependencies": {
-    "humanize-ms": "^1.2.1"
+    "ms": "^2.1.1"
   },
   "devDependencies": {
     "autod": "^2.8.0",