diff --git a/README.md b/README.md
index d2292ca..d0fa1e9 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,8 @@ Output will be -
 
 ### Versions
 
++ `v1.0.1`
+     + Bug Fixed : data null checks & default true fix
 +  `v1.0.0`
 	 + Initial release - containing basic `sort` function only.
 
diff --git a/index.js b/index.js
index 65ba879..91e13d7 100644
--- a/index.js
+++ b/index.js
@@ -22,7 +22,7 @@ OR PERFORMANCE OF THIS SOFTWARE.
  */
 const typeOf = function (data) {
     const objectConstructor = {}.constructor;
-    if (data.constructor === objectConstructor) {
+    if (data && data !== null && data.constructor === objectConstructor) {
         return "OBJECT";
     } else {
         return "";
@@ -44,7 +44,7 @@ function jsonSort(data, sort) {
         newData = {};
 
     if (!sort)
-        sort = false;
+        sort = true;
 
     keys = Object.keys(data).sort();
 
diff --git a/package.json b/package.json
index 9e2edf6..fdc0420 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "json-keys-sort",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Sorting a json object based on keys either ascending or descending & even recursively",
   "main": "index.js",
   "repository": {