diff --git a/lib/utils.js b/lib/utils.js
index 8946055dac..a193ae6bc5 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,7 +1,6 @@
 'use strict';
 
 var bind = require('./helpers/bind');
-var isBuffer = require('is-buffer');
 
 /*global toString:true*/
 
@@ -9,6 +8,16 @@ var isBuffer = require('is-buffer');
 
 var toString = Object.prototype.toString;
 
+/**
+ * Determine if an object is a buffer
+ * @param {Object} obj The object to test
+ * @returns {boolean} True if the object is a buffer, otherwise false
+ */
+function isBuffer (obj) {
+  return obj != null && obj.constructor != null &&
+    typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
+}
+
 /**
  * Determine if a value is an Array
  *
diff --git a/package.json b/package.json
index 4905921b89..06b57de876 100644
--- a/package.json
+++ b/package.json
@@ -73,8 +73,7 @@
   },
   "typings": "./index.d.ts",
   "dependencies": {
-    "follow-redirects": "1.5.10",
-    "is-buffer": "^2.0.2"
+    "follow-redirects": "1.5.10"
   },
   "bundlesize": [
     {