diff --git a/lib/helpers.js b/lib/helpers.js
index d2993c84..06acfa51 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -39,8 +39,6 @@ function getRange (start, end) {
     return output;
 }
 
-var assignObject = Object.assign || require('object-assign');
-
 function forEachInObject (obj, func) {
     var keys = Object.keys(obj);
     var keysLength = keys.length;
@@ -51,7 +49,6 @@ function forEachInObject (obj, func) {
 }
 
 module.exports = {
-    assignObject,
     forEachInObject,
     getClassName,
     getRange
diff --git a/package.json b/package.json
index 9ac42838..46a83029 100644
--- a/package.json
+++ b/package.json
@@ -39,8 +39,9 @@
     "phantomjs": "^1.9.18"
   },
   "dependencies": {
-    "moment": "^2.10.6",
-    "object-assign": "^4.0.1",
+    "moment": "^2.10.6"
+  },
+  "peerDependencies": {
     "react": "^0.14",
     "react-dom": "^0.14.0"
   },
diff --git a/specs/helpers.spec.js b/specs/helpers.spec.js
index 38907519..471a5d05 100644
--- a/specs/helpers.spec.js
+++ b/specs/helpers.spec.js
@@ -29,15 +29,6 @@ describe('Helpers', function () {
         expect(H.getRange(3, 6)).toEqual([3, 4, 5, 6]);
     });
 
-    it('assignObject', function () {
-        // jscs:disable requirePaddingNewLinesInObjects
-        expect(H.assignObject({a: 1}, {b: 2}, {c: 3})).toEqual({
-            a: 1,
-            b: 2,
-            c: 3
-        });
-    });
-
     it('forEachInObject', function () {
         var obj = {
             a: 1,