diff --git a/dist/handlebars.binding.js b/dist/handlebars.binding.js
index 0c94c04..4ae0c62 100644
--- a/dist/handlebars.binding.js
+++ b/dist/handlebars.binding.js
@@ -1,6 +1,6 @@
 // handlebars.binding
 // ------------------
-// v0.3.7
+// v0.3.8
 //
 // Copyright (c) 2013-2017 Mateus Maso
 // Distributed under MIT license
@@ -1133,7 +1133,7 @@ function isObject(object) {
 }
 
 function isString(object) {
-  return toString.call(object) == '[object String]';
+  return typeof object === 'string' || object instanceof String;
 }
 
 function uniqueId() {
diff --git a/dist/handlebars.binding.min.js b/dist/handlebars.binding.min.js
index 949e476..95ca6a4 100644
--- a/dist/handlebars.binding.min.js
+++ b/dist/handlebars.binding.min.js
@@ -1,10 +1,10 @@
 // handlebars.binding
 // ------------------
-// v0.3.7
+// v0.3.8
 //
 // Copyright (c) 2013-2017 Mateus Maso
 // Distributed under MIT license
 //
 //
 
-!function e(t,n,r){function i(o,a){if(!n[o]){if(!t[o]){var u="function"==typeof require&&require;if(!a&&u)return u(o,!0);if(s)return s(o,!0);var l=new Error("Cannot find module '"+o+"'");throw l.code="MODULE_NOT_FOUND",l}var h=n[o]={exports:{}};t[o][0].call(h.exports,function(e){var n=t[o][1][e];return i(n||e)},h,h.exports,e,t,n,r)}return n[o].exports}for(var s="function"==typeof require&&require,o=0;o<r.length;o++)i(r[o]);return i}({1:[function(e,t,n){"use strict";function r(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}Object.defineProperty(n,"__esModule",{value:!0});var i=function(){function e(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}return function(t,n,r){return n&&e(t.prototype,n),r&&e(t,r),t}}(),s=e("observe-js"),o=e("../utils"),a=e("../deps"),u=function(e){return e&&e.__esModule?e:{default:e}}(a),l=e("../core"),h=function(){function e(t,n,i,s){r(this,e),this.node,this.observer,this.output,this.previousOutput,this.marker,this.delimiter,this.id=(0,a.getUtils)().uniqueId(),this.value=i,this.context=t,this.keypath=n,this.options=s,n&&(this.value=(0,o.path)(this.context,this.keypath))}return i(e,[{key:"setNode",value:function(e){return e.bindings=e.bindings||[],e.bindings.push(this),this.node=e}},{key:"setMarker",value:function(e){return e.binding=this,this.marker=e}},{key:"setDelimiter",value:function(e){return this.delimiter=e}},{key:"setOutput",value:function(e){return this.previousOutput=this.output,this.output=e}},{key:"setObserver",value:function(e){return this.observer=e}},{key:"createElement",value:function(){return'<hb-binding id="'+this.id+'"></hb-binding>'}},{key:"createAttribute",value:function(){return"hb-binding-"+this.id}},{key:"initialize",value:function(){return this.options.hash.attr?this.initializeAttribute():this.options.fn?this.initializeBlock():this.initializeInline()}},{key:"initializeAttribute",value:function(e){var t=this,n="binding-"+this.id;return u.default.Handlebars.registerAttribute(n,function(e){return null},{ready:function(e){t.setNode(e),t.render({initialize:!0}),t.observe(),delete u.default.Handlebars.attributes[n]}}),this.createAttribute()}},{key:"initializeInline",value:function(){return this.setNode(document.createTextNode("")),this.render({initialize:!0}),this.observe(),u.default.Handlebars.store.hold(this.id,(0,a.getUtils)().flatten([this.node])),new u.default.Handlebars.SafeString(this.createElement())}},{key:"initializeBlock",value:function(){this.setMarker(document.createTextNode("")),this.setDelimiter(document.createTextNode(""));var e=this.render({initialize:!0});return this.observe(),u.default.Handlebars.store.hold(this.id,(0,a.getUtils)().flatten([this.marker,e,this.delimiter])),new u.default.Handlebars.SafeString(this.createElement())}},{key:"runOutput",value:function(){this.options.fn?this.setOutput(this.options.fn(this.context)):this.setOutput(this.value)}},{key:"render",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return this.runOutput(),this.options.hash.attr?this.renderAttribute(e):this.options.fn?this.renderBlock(e):this.renderInline(e)}},{key:"renderAttribute",value:function(){arguments.length>0&&void 0!==arguments[0]&&arguments[0];1==this.options.hash.attr?this.previousOutput!=this.output&&(this.node.removeAttribute(this.previousOutput),this.node.setAttribute(this.output,"")):"class"==this.options.hash.attr?((0,o.removeClass)(this.node,this.previousOutput),(0,o.addClass)(this.node,this.output)):this.node.setAttribute(this.options.hash.attr,this.output)}},{key:"renderInline",value:function(){arguments.length>0&&void 0!==arguments[0]&&arguments[0];(0,a.getUtils)().isString(this.output)?this.node.textContent=(0,a.getUtils)().escapeExpression(new u.default.Handlebars.SafeString(this.output)):this.node.textContent=(0,a.getUtils)().escapeExpression(this.output)}},{key:"renderBlock",value:function(){if((arguments.length>0&&void 0!==arguments[0]?arguments[0]:{}).initialize)return u.default.Handlebars.parseHTML(this.output);(0,o.removeBetween)(this.marker,this.delimiter).forEach(function(e){return(0,l.unbind)(e)}),(0,a.getUtils)().insertAfter(this.marker,u.default.Handlebars.parseHTML(this.output))}},{key:"observe",value:function(){var e=this;(0,a.getUtils)().isArray(this.value)?(this.setObserver(new s.ArrayObserver(this.value)),this.observer.open(function(){return e.render()})):(0,a.getUtils)().isObject(this.value)?(this.setObserver(new s.ObjectObserver(this.value)),this.observer.open(function(){return e.render()})):(this.setObserver(new s.PathObserver(this.context,this.keypath)),this.observer.open(function(t){e.value=t,e.render()}))}},{key:"stopObserving",value:function(){this.observer&&this.observer.close()}}]),e}();n.default=h},{"../core":5,"../deps":6,"../utils":8,"observe-js":14}],2:[function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}function i(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function s(e,t){if(!e)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return!t||"object"!=typeof t&&"function"!=typeof t?e:t}function o(e,t){if("function"!=typeof t&&null!==t)throw new TypeError("Super expression must either be null or a function, not "+typeof t);e.prototype=Object.create(t&&t.prototype,{constructor:{value:e,enumerable:!1,writable:!0,configurable:!0}}),t&&(Object.setPrototypeOf?Object.setPrototypeOf(e,t):e.__proto__=t)}Object.defineProperty(n,"__esModule",{value:!0});var a=function(){function e(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}return function(t,n,r){return n&&e(t.prototype,n),r&&e(t,r),t}}(),u=function e(t,n,r){null===t&&(t=Function.prototype);var i=Object.getOwnPropertyDescriptor(t,n);if(void 0===i){var s=Object.getPrototypeOf(t);return null===s?void 0:e(s,n,r)}if("value"in i)return i.value;var o=i.get;if(void 0!==o)return o.call(r)},l=e("observe-js"),h=r(e("./binding")),c=e("../utils"),d=e("../deps"),f=r(d),v=e("../core"),p=function(e){function t(){return i(this,t),s(this,(t.__proto__||Object.getPrototypeOf(t)).apply(this,arguments))}return o(t,e),a(t,[{key:"initialize",value:function(){return this.options.hash.bind?u(t.prototype.__proto__||Object.getPrototypeOf(t.prototype),"initialize",this).call(this):this.runOutput()}},{key:"runOutput",value:function(){return this.options.hash.var?this.context[this.options.hash.var]=this.value:(0,d.getUtils)().isObject(this.value)&&(0,d.getUtils)().extend(this.context,this.value),this.setOutput(this.options.fn(this.context))}},{key:"observe",value:function(){var e=this;this.parentContextObserver=new l.ObjectObserver(this.options.hash.parentContext),this.parentContextObserver.open(function(){(0,d.getUtils)().extend(e.context,e.options.hash.parentContext)}),(0,d.getUtils)().isObject(this.value)&&(this.options.hash.var||(this.setObserver(new l.ObjectObserver(this.value)),this.observer.open(function(){return(0,d.getUtils)().extend(e.context,e.value)})))}}]),t}(h.default),b=function(e){function t(e,n,r,o){i(this,t);var a=s(this,(t.__proto__||Object.getPrototypeOf(t)).call(this,e,n,r,o));return a.itemBindings=[],a.empty=0==r.length,a.options.hash.parentContext=a.context,a}return o(t,e),a(t,[{key:"initialize",value:function(){return this.options.hash.bind?u(t.prototype.__proto__||Object.getPrototypeOf(t.prototype),"initialize",this).call(this):this.runOutput()}},{key:"observe",value:function(){var e=this;this.setObserver(new l.ArrayObserver(this.value)),this.observer.open(function(t){t.forEach(function(t){e.empty=0==e.value.length,e.render({splice:t})}),e.value.forEach(function(t,n){e.itemBindings[n].context.index=n})})}},{key:"runOutput",value:function(){var e=this,t="";return this.itemBindings=[],this.value.forEach(function(n,r){var i=new p((0,d.getUtils)().extend({index:r,$this:n},e.context),null,n,e.options);e.itemBindings.push(i),t+=i.initialize()}),this.setOutput(this.empty?this.options.inverse(this.context):t)}},{key:"render",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};if(!e.splice)return u(t.prototype.__proto__||Object.getPrototypeOf(t.prototype),"render",this).call(this,e);var n=e.splice;if(n.removed.length>0)for(var 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this.falsy?this.setOutput(this.options.inverse?this.options.inverse(this.context):this.options.hash.else):this.setOutput(this.options.fn?this.options.fn(this.context):this.options.hash.then)}},{key:"renderAttribute",value:function(){arguments.length>0&&void 0!==arguments[0]&&arguments[0];1==this.options.hash.attr?(this.node.removeAttribute(this.previousOutput),this.output&&this.node.setAttribute(this.output,"")):"class"==this.options.hash.attr?((0,d.removeClass)(this.node,this.previousOutput),(0,d.addClass)(this.node,this.output)):this.node.setAttribute(this.options.hash.attr,this.output)}}]),t}(h.default);n.default=f},{"../deps":6,"../utils":8,"./binding":1,"observe-js":14}],4:[function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}Object.defineProperty(n,"__esModule",{value:!0}),n.EachBinding=n.IfBinding=n.Binding=void 0;var i=r(e("./binding")),s=r(e("./if_binding")),o=r(e("./each_binding"));n.Binding=i.default,n.IfBinding=s.default,n.EachBinding=o.default},{"./binding":1,"./each_binding":2,"./if_binding":3}],5:[function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}function i(e){(0,l.traverse)(e,function(e){e.binding?e.binding.observe():e.bindings&&e.bindings.forEach(function(e){return e.observe()})})}function s(e){(0,l.traverse)(e,function(e){e.binding?e.binding.stopObserving():e.bindings&&e.bindings.forEach(function(e){return e.stopObserving()})})}function o(){Platform.performMicrotaskCheckpoint()}function a(){c.default.Handlebars.registerHelper("bind",function(e,t){return new u.Binding(this,e,null,t).initialize()}),c.default.Handlebars.registerHelper("if",function(e,t){var n;return t.hash.bindAttr&&(t.hash.attr=t.hash.bindAttr,t.hash.bind=!0),t.hash.bind&&(0,h.getUtils)().isString(e)&&(n=e,e=(0,l.path)(this,n)),new u.IfBinding(this,n,e,t).initialize()}),c.default.Handlebars.registerHelper("each",function(e,t){return new u.EachBinding(this,null,e,t).initialize()}),c.default.Handlebars.registerHelper("unless",function(e,t){var n=t.fn,r=t.inverse,i=t.hash.then,s=t.hash.else;return t.fn=r,t.inverse=n,t.hash.then=s,t.hash.else=i,c.default.Handlebars.helpers.if.apply(this,[e,t])}),c.default.Handlebars.registerElement("binding",function(e){return e.id})}Object.defineProperty(n,"__esModule",{value:!0}),n.bind=i,n.unbind=s,n.update=o,n.register=a;r(e("observe-js"));var u=e("../bindings"),l=e("../utils"),h=e("../deps"),c=r(h)},{"../bindings":4,"../deps":6,"../utils":8,"observe-js":14}],6:[function(e,t,n){"use strict";function r(){return i.Handlebars.Utils}Object.defineProperty(n,"__esModule",{value:!0}),n.getUtils=r;var i={};n.default=i},{}],7:[function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}function i(e){if(!l.default.Handlebars){(0,s.default)(e);var 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\ No newline at end of file
diff --git a/package.json b/package.json
index 234116e..8fea8cf 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "handlebars.binding",
   "description": "Handlebars plugin for using one-way data binding",
-  "version": "0.3.7",
+  "version": "0.3.8",
   "author": "mateusmaso",
   "license": "MIT",
   "keywords": [
@@ -24,7 +24,7 @@
   },
   "repository": "http://github.com/mateusmaso/handlebars.binding",
   "dependencies": {
-    "handlebars.element": "~0.3.5",
+    "handlebars.element": "~0.3.6",
     "observe-js": "~0.5.7"
   },
   "scripts": {