diff --git a/History.md b/History.md
index 9378c5e..af6b2a1 100644
--- a/History.md
+++ b/History.md
@@ -1,4 +1,4 @@
-1.1.0 / 2018-06-29
+1.1.1 / 2018-06-29
 ==================
   * add Number.parse
 
diff --git a/lib/number.js b/lib/number.js
index a51bad1..cd59cb6 100644
--- a/lib/number.js
+++ b/lib/number.js
@@ -12,6 +12,9 @@
 if (!Number.parse) {
   Object.defineProperty(Number, 'parse', {
     value: function(val) {
+      if (typeof val !== 'number' && typeof val !== 'string') {
+        return val
+      }
       val += ''
       if (val.startsWith(0) && !val.startsWith('0.')) {
         return val
diff --git a/package.json b/package.json
index c418c31..c38136e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "es.shim",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "Some shim api that let you can use in all node.js environment",
   "keyworks": [
     "es5",