diff --git a/package.json b/package.json
index c7c71f0..be013ff 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
     "eventemitter3": "^1.1.0",
     "lodash.assign": "^3.2.0",
     "lodash.isfunction": "^3.0.5",
+    "lodash.isnumber": "^3.0.1",
     "lodash.isplainobject": "^3.1.0",
     "lodash.pick": "^3.1.0",
     "point-geometry": "0.0.0",
diff --git a/src/google_map.js b/src/google_map.js
index ca71dbd..3425ec6 100644
--- a/src/google_map.js
+++ b/src/google_map.js
@@ -17,6 +17,7 @@ import isFunction from 'lodash.isfunction';
 import isPlainObject from 'lodash.isplainobject';
 import pick from 'lodash.pick';
 import assign from 'lodash.assign';
+import isNumber from 'lodash.isnumber';
 
 const kEPS = 0.00001;
 const K_GOOGLE_TILE_SIZE = 256;
@@ -41,12 +42,6 @@ const style = {
   position: 'relative'
 };
 
-
-function isNumber(n) {
-  return !Number.isNaN(parseFloat(n)) && Number.isFinite(n);
-}
-
-
 export default class GoogleMap extends Component {
 
   static propTypes = {