diff --git a/bower.json b/bower.json
index 3326058..dc7be81 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "moment-range",
-  "version": "2.0.3",
+  "version": "2.1.0",
   "main": "./dist/moment-range.js",
   "ignore": [
     "**/.*",
diff --git a/dist/moment-range.js b/dist/moment-range.js
index ae05754..bc1cb16 100644
--- a/dist/moment-range.js
+++ b/dist/moment-range.js
@@ -69,8 +69,8 @@ function DateRange(start, end) {
     }
   }
 
-  this.start = moment(s);
-  this.end   = moment(e);
+  this.start = (s === null) ? moment(-8640000000000000) : moment(s);
+  this.end   = (e === null) ? moment(8640000000000000) : moment(e);
 }
 
 /**
diff --git a/dist/moment-range.min.js b/dist/moment-range.min.js
index cf83525..0b47788 100644
--- a/dist/moment-range.min.js
+++ b/dist/moment-range.min.js
@@ -1 +1 @@
-!function(a,b){"function"==typeof define&&define.amd?define(["moment"],function(c){return a.DateRange=b(c)}):"object"==typeof exports?module.exports=b(require("moment")):a.DateRange=b(moment)}(this,function(a){function b(b,c){var d,e=b,f=c;(1===arguments.length||void 0===c)&&("object"==typeof b&&2===b.length?(e=b[0],f=b[1]):"string"==typeof b&&(d=b.split("/"),e=d[0],f=d[1])),this.start=a(e),this.end=a(f)}function c(b,c,d){for(var e=a(this.start);this.contains(e,d);)c.call(this,e.clone()),e.add(1,b)}function d(b,c,d){var e=this/b,f=Math.floor(e);if(f!==1/0){f===e&&d&&f--;for(var g=0;f>=g;g++)c.call(this,a(this.start.valueOf()+b.valueOf()*g))}}var e={year:!0,month:!0,week:!0,day:!0,hour:!0,minute:!0,second:!0};return b.prototype.constructor=b,b.prototype.clone=function(){return a().range(this.start,this.end)},b.prototype.contains=function(a,c){var d=this.start,e=this.end;return a instanceof b?d<=a.start&&(e>a.end||e.isSame(a.end)&&!c):a>=d&&(e>a||e.isSame(a)&&!c)},b.prototype.overlaps=function(a){return null!==this.intersect(a)},b.prototype.intersect=function(a){var c=this.start,d=this.end;return c<=a.start&&a.start<d&&d<a.end?new b(a.start,d):a.start<c&&c<a.end&&a.end<=d?new b(c,a.end):a.start<c&&d>=c&&d<a.end?this:c<=a.start&&a.start<=a.end&&a.end<=d?a:null},b.prototype.add=function(c){return this.overlaps(c)?new b(a.min(this.start,c.start),a.max(this.end,c.end)):null},b.prototype.subtract=function(a){var c=this.start,d=this.end;return null===this.intersect(a)?[this]:a.start<=c&&d>c&&d<=a.end?[]:a.start<=c&&c<a.end&&a.end<d?[new b(a.end,d)]:c<a.start&&a.start<d&&d<=a.end?[new b(c,a.start)]:c<a.start&&a.start<a.end&&a.end<d?[new b(c,a.start),new b(a.end,d)]:c<a.start&&a.start<d&&a.end<d?[new b(c,a.start),new b(a.start,d)]:void 0},b.prototype.by=function(a,b,e){return"string"==typeof a?c.call(this,a,b,e):d.call(this,a,b,e),this},b.prototype.toString=function(){return this.start.format()+"/"+this.end.format()},b.prototype.valueOf=function(){return this.end-this.start},b.prototype.center=function(){var b=this.start+this.diff()/2;return a(b)},b.prototype.toDate=function(){return[this.start.toDate(),this.end.toDate()]},b.prototype.isSame=function(a){return this.start.isSame(a.start)&&this.end.isSame(a.end)},b.prototype.diff=function(a){return this.end.diff(this.start,a)},a.range=function(c,d){return c in e?new b(a(this).startOf(c),a(this).endOf(c)):new b(c,d)},a.range.constructor=b,a.fn.range=a.range,a.fn.within=function(a){return a.contains(this._d)},b});
\ No newline at end of file
+!function(a,b){"function"==typeof define&&define.amd?define(["moment"],function(c){return a.DateRange=b(c)}):"object"==typeof exports?module.exports=b(require("moment")):a.DateRange=b(moment)}(this,function(a){function b(b,c){var d,e=b,f=c;(1===arguments.length||void 0===c)&&("object"==typeof b&&2===b.length?(e=b[0],f=b[1]):"string"==typeof b&&(d=b.split("/"),e=d[0],f=d[1])),this.start=a(null===e?-864e13:e),this.end=a(null===f?864e13:f)}function c(b,c,d){for(var e=a(this.start);this.contains(e,d);)c.call(this,e.clone()),e.add(1,b)}function d(b,c,d){var e=this/b,f=Math.floor(e);if(f!==1/0){f===e&&d&&f--;for(var g=0;f>=g;g++)c.call(this,a(this.start.valueOf()+b.valueOf()*g))}}var e={year:!0,month:!0,week:!0,day:!0,hour:!0,minute:!0,second:!0};return b.prototype.constructor=b,b.prototype.clone=function(){return a().range(this.start,this.end)},b.prototype.contains=function(a,c){var d=this.start,e=this.end;return a instanceof b?d<=a.start&&(e>a.end||e.isSame(a.end)&&!c):a>=d&&(e>a||e.isSame(a)&&!c)},b.prototype.overlaps=function(a){return null!==this.intersect(a)},b.prototype.intersect=function(a){var c=this.start,d=this.end;return c<=a.start&&a.start<d&&d<a.end?new b(a.start,d):a.start<c&&c<a.end&&a.end<=d?new b(c,a.end):a.start<c&&d>=c&&d<a.end?this:c<=a.start&&a.start<=a.end&&a.end<=d?a:null},b.prototype.add=function(c){return this.overlaps(c)?new b(a.min(this.start,c.start),a.max(this.end,c.end)):null},b.prototype.subtract=function(a){var c=this.start,d=this.end;return null===this.intersect(a)?[this]:a.start<=c&&d>c&&d<=a.end?[]:a.start<=c&&c<a.end&&a.end<d?[new b(a.end,d)]:c<a.start&&a.start<d&&d<=a.end?[new b(c,a.start)]:c<a.start&&a.start<a.end&&a.end<d?[new b(c,a.start),new b(a.end,d)]:c<a.start&&a.start<d&&a.end<d?[new b(c,a.start),new b(a.start,d)]:void 0},b.prototype.by=function(a,b,e){return"string"==typeof a?c.call(this,a,b,e):d.call(this,a,b,e),this},b.prototype.toString=function(){return this.start.format()+"/"+this.end.format()},b.prototype.valueOf=function(){return this.end-this.start},b.prototype.center=function(){var b=this.start+this.diff()/2;return a(b)},b.prototype.toDate=function(){return[this.start.toDate(),this.end.toDate()]},b.prototype.isSame=function(a){return this.start.isSame(a.start)&&this.end.isSame(a.end)},b.prototype.diff=function(a){return this.end.diff(this.start,a)},a.range=function(c,d){return c in e?new b(a(this).startOf(c),a(this).endOf(c)):new b(c,d)},a.range.constructor=b,a.fn.range=a.range,a.fn.within=function(a){return a.contains(this._d)},b});
\ No newline at end of file
diff --git a/package.json b/package.json
index 6386df9..a484238 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   "directories": {
     "lib": "./lib"
   },
-  "version": "2.0.3",
+  "version": "2.1.0",
   "engines": {
     "node": "*"
   },