diff --git a/package.json b/package.json
index 0c555896..3bd7a633 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,8 @@
     "react-component"
   ],
   "dependencies": {
-    "form-data-to-object": "^0.2.0"
+    "form-data-to-object": "^0.2.0",
+    "prop-types": "^15.5.10"
   },
   "devDependencies": {
     "babel-cli": "^6.6.5",
diff --git a/src/Mixin.js b/src/Mixin.js
index b8be8be2..f518dd46 100644
--- a/src/Mixin.js
+++ b/src/Mixin.js
@@ -1,6 +1,7 @@
 var PropTypes = require('prop-types');
 var utils = require('./utils.js');
 var React = global.React || require('react');
+var PropTypes = require('prop-types');
 
 var convertValidationsToObject = function (validations) {
 
diff --git a/src/main.js b/src/main.js
index 27ee7276..b7b8613c 100644
--- a/src/main.js
+++ b/src/main.js
@@ -1,5 +1,6 @@
 var PropTypes = require('prop-types');
 var React = global.React || require('react');
+var PropTypes = require('prop-types');
 var createReactClass = require('create-react-class');
 var Formsy = {};
 var validationRules = require('./validationRules.js');