diff --git a/dist/js/bulma-slider.js b/dist/js/bulma-slider.js
index 063ab9a..c6718de 100644
--- a/dist/js/bulma-slider.js
+++ b/dist/js/bulma-slider.js
@@ -167,7 +167,7 @@ var bulmaSlider = function (_EventEmitter) {
       var result = null;
       var outputs = document.getElementsByTagName('output') || [];
 
-      outputs.forEach(function (output) {
+      Array.from(outputs).forEach(function (output) {
         if (output.htmlFor == _this2.element.getAttribute('id')) {
           result = output;
           return true;
diff --git a/dist/js/bulma-slider.min.js b/dist/js/bulma-slider.min.js
index b29d433..7e62685 100644
--- a/dist/js/bulma-slider.min.js
+++ b/dist/js/bulma-slider.min.js
@@ -1 +1 @@
-!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.bulmaSlider=e():t.bulmaSlider=e()}("undefined"!=typeof self?self:this,function(){return function(n){var r={};function i(t){if(r[t])return r[t].exports;var e=r[t]={i:t,l:!1,exports:{}};return n[t].call(e.exports,e,e.exports,i),e.l=!0,e.exports}return i.m=n,i.c=r,i.d=function(t,e,n){i.o(t,e)||Object.defineProperty(t,e,{configurable:!1,enumerable:!0,get:n})},i.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return i.d(e,"a",e),e},i.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},i.p="",i(i.s=0)}([function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0}),n.d(e,"isString",function(){return l});var r=n(1),i=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n=arguments[e];for(var r in n)Object.prototype.hasOwnProperty.call(n,r)&&(t[r]=n[r])}return t},u=function(){function r(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}return function(t,e,n){return e&&r(t.prototype,e),n&&r(t,n),t}}(),o="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t};var l=function(t){return"string"==typeof t||!!t&&"object"===(void 0===t?"undefined":o(t))&&"[object String]"===Object.prototype.toString.call(t)},a=function(t){function o(t){var e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{};!function(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}(this,o);var n=function(t,e){if(!t)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return!e||"object"!=typeof e&&"function"!=typeof e?t:e}(this,(o.__proto__||Object.getPrototypeOf(o)).call(this));if(n.element="string"==typeof t?document.querySelector(t):t,!n.element)throw new Error("An invalid selector or non-DOM node has been provided.");return n._clickEvents=["click"],n.options=i({},e),n.onSliderInput=n.onSliderInput.bind(n),n.init(),n}return function(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function, not "+typeof e);t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}}),e&&(Object.setPrototypeOf?Object.setPrototypeOf(t,e):t.__proto__=e)}(o,r["a"]),u(o,[{key:"init",value:function(){if(this._id="bulmaSlider"+(new Date).getTime()+Math.floor(Math.random()*Math.floor(9999)),this.output=this._findOutputForSlider(),this._bindEvents(),this.output&&this.element.classList.contains("has-output-tooltip")){var t=this._getSliderOutputPosition();this.output.style.left=t.position}this.emit("bulmaslider:ready",this.element.value)}},{key:"_findOutputForSlider",value:function(){var e=this,n=null;return(document.getElementsByTagName("output")||[]).forEach(function(t){if(t.htmlFor==e.element.getAttribute("id"))return n=t,!0}),n}},{key:"_getSliderOutputPosition",value:function(){var t,e=window.getComputedStyle(this.element,null),n=parseInt(e.getPropertyValue("width"),10);t=this.element.getAttribute("min")?this.element.getAttribute("min"):0;var r=(this.element.value-t)/(this.element.getAttribute("max")-t);return{position:(r<0?0:1<r?n:n*r)+"px"}}},{key:"_bindEvents",value:function(){this.output&&this.element.addEventListener("input",this.onSliderInput,!1)}},{key:"onSliderInput",value:function(t){if(t.preventDefault(),this.element.classList.contains("has-output-tooltip")){var e=this._getSliderOutputPosition();this.output.style.left=e.position}var n=this.output.hasAttribute("data-prefix")?this.output.getAttribute("data-prefix"):"",r=this.output.hasAttribute("data-postfix")?this.output.getAttribute("data-postfix"):"";this.output.value=n+this.element.value+r,this.emit("bulmaslider:ready",this.element.value)}}],[{key:"attach",value:function(){var n=this,t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:'input[type="range"].slider',r=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{},i=new Array;return(l(t)?document.querySelectorAll(t):Array.isArray(t)?t:[t]).forEach(function(t){if(void 0===t[n.constructor.name]){var e=new o(t,r);t[n.constructor.name]=e,i.push(e)}else i.push(t[n.constructor.name])}),i}}]),o}();e.default=a},function(t,e,n){"use strict";var r=function(){function r(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}return function(t,e,n){return e&&r(t.prototype,e),n&&r(t,n),t}}();var i=function(){function e(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:[];!function(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}(this,e),this._listeners=new Map(t),this._middlewares=new Map}return r(e,[{key:"listenerCount",value:function(t){return this._listeners.has(t)?this._listeners.get(t).length:0}},{key:"removeListeners",value:function(){var e=this,t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:null,n=1<arguments.length&&void 0!==arguments[1]&&arguments[1];null!==t?Array.isArray(t)?name.forEach(function(t){return e.removeListeners(t,n)}):(this._listeners.delete(t),n&&this.removeMiddleware(t)):this._listeners=new Map}},{key:"middleware",value:function(t,e){var n=this;Array.isArray(t)?name.forEach(function(t){return n.middleware(t,e)}):(Array.isArray(this._middlewares.get(t))||this._middlewares.set(t,[]),this._middlewares.get(t).push(e))}},{key:"removeMiddleware",value:function(){var e=this,t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:null;null!==t?Array.isArray(t)?name.forEach(function(t){return e.removeMiddleware(t)}):this._middlewares.delete(t):this._middlewares=new Map}},{key:"on",value:function(t,e){var n=this,r=2<arguments.length&&void 0!==arguments[2]&&arguments[2];if(Array.isArray(t))t.forEach(function(t){return n.on(t,e)});else{var i=(t=t.toString()).split(/,|, | /);1<i.length?i.forEach(function(t){return n.on(t,e)}):(Array.isArray(this._listeners.get(t))||this._listeners.set(t,[]),this._listeners.get(t).push({once:r,callback:e}))}}},{key:"once",value:function(t,e){this.on(t,e,!0)}},{key:"emit",value:function(n,r){var i=this,o=2<arguments.length&&void 0!==arguments[2]&&arguments[2];n=n.toString();var u=this._listeners.get(n),l=null,a=0,s=o;if(Array.isArray(u))for(u.forEach(function(t,e){o||(l=i._middlewares.get(n),Array.isArray(l)?(l.forEach(function(t){t(r,function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:null;null!==t&&(r=t),a++},n)}),a>=l.length&&(s=!0)):s=!0),s&&(t.once&&(u[e]=null),t.callback(r))});-1!==u.indexOf(null);)u.splice(u.indexOf(null),1)}}]),e}();e.a=i}]).default});
\ No newline at end of file
+!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.bulmaSlider=e():t.bulmaSlider=e()}("undefined"!=typeof self?self:this,function(){return function(n){var r={};function i(t){if(r[t])return r[t].exports;var e=r[t]={i:t,l:!1,exports:{}};return n[t].call(e.exports,e,e.exports,i),e.l=!0,e.exports}return i.m=n,i.c=r,i.d=function(t,e,n){i.o(t,e)||Object.defineProperty(t,e,{configurable:!1,enumerable:!0,get:n})},i.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return i.d(e,"a",e),e},i.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},i.p="",i(i.s=0)}([function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0}),n.d(e,"isString",function(){return l});var r=n(1),i=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n=arguments[e];for(var r in n)Object.prototype.hasOwnProperty.call(n,r)&&(t[r]=n[r])}return t},u=function(){function r(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}return function(t,e,n){return e&&r(t.prototype,e),n&&r(t,n),t}}(),o="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t};var l=function(t){return"string"==typeof t||!!t&&"object"===(void 0===t?"undefined":o(t))&&"[object String]"===Object.prototype.toString.call(t)},a=function(t){function o(t){var e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{};!function(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}(this,o);var n=function(t,e){if(!t)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return!e||"object"!=typeof e&&"function"!=typeof e?t:e}(this,(o.__proto__||Object.getPrototypeOf(o)).call(this));if(n.element="string"==typeof t?document.querySelector(t):t,!n.element)throw new Error("An invalid selector or non-DOM node has been provided.");return n._clickEvents=["click"],n.options=i({},e),n.onSliderInput=n.onSliderInput.bind(n),n.init(),n}return function(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function, not "+typeof e);t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}}),e&&(Object.setPrototypeOf?Object.setPrototypeOf(t,e):t.__proto__=e)}(o,r["a"]),u(o,[{key:"init",value:function(){if(this._id="bulmaSlider"+(new Date).getTime()+Math.floor(Math.random()*Math.floor(9999)),this.output=this._findOutputForSlider(),this._bindEvents(),this.output&&this.element.classList.contains("has-output-tooltip")){var t=this._getSliderOutputPosition();this.output.style.left=t.position}this.emit("bulmaslider:ready",this.element.value)}},{key:"_findOutputForSlider",value:function(){var e=this,n=null,t=document.getElementsByTagName("output")||[];return Array.from(t).forEach(function(t){if(t.htmlFor==e.element.getAttribute("id"))return n=t,!0}),n}},{key:"_getSliderOutputPosition",value:function(){var t,e=window.getComputedStyle(this.element,null),n=parseInt(e.getPropertyValue("width"),10);t=this.element.getAttribute("min")?this.element.getAttribute("min"):0;var r=(this.element.value-t)/(this.element.getAttribute("max")-t);return{position:(r<0?0:1<r?n:n*r)+"px"}}},{key:"_bindEvents",value:function(){this.output&&this.element.addEventListener("input",this.onSliderInput,!1)}},{key:"onSliderInput",value:function(t){if(t.preventDefault(),this.element.classList.contains("has-output-tooltip")){var e=this._getSliderOutputPosition();this.output.style.left=e.position}var n=this.output.hasAttribute("data-prefix")?this.output.getAttribute("data-prefix"):"",r=this.output.hasAttribute("data-postfix")?this.output.getAttribute("data-postfix"):"";this.output.value=n+this.element.value+r,this.emit("bulmaslider:ready",this.element.value)}}],[{key:"attach",value:function(){var n=this,t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:'input[type="range"].slider',r=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{},i=new Array;return(l(t)?document.querySelectorAll(t):Array.isArray(t)?t:[t]).forEach(function(t){if(void 0===t[n.constructor.name]){var e=new o(t,r);t[n.constructor.name]=e,i.push(e)}else i.push(t[n.constructor.name])}),i}}]),o}();e.default=a},function(t,e,n){"use strict";var r=function(){function r(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}return function(t,e,n){return e&&r(t.prototype,e),n&&r(t,n),t}}();var i=function(){function e(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:[];!function(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}(this,e),this._listeners=new Map(t),this._middlewares=new Map}return r(e,[{key:"listenerCount",value:function(t){return this._listeners.has(t)?this._listeners.get(t).length:0}},{key:"removeListeners",value:function(){var e=this,t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:null,n=1<arguments.length&&void 0!==arguments[1]&&arguments[1];null!==t?Array.isArray(t)?name.forEach(function(t){return e.removeListeners(t,n)}):(this._listeners.delete(t),n&&this.removeMiddleware(t)):this._listeners=new Map}},{key:"middleware",value:function(t,e){var n=this;Array.isArray(t)?name.forEach(function(t){return n.middleware(t,e)}):(Array.isArray(this._middlewares.get(t))||this._middlewares.set(t,[]),this._middlewares.get(t).push(e))}},{key:"removeMiddleware",value:function(){var e=this,t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:null;null!==t?Array.isArray(t)?name.forEach(function(t){return e.removeMiddleware(t)}):this._middlewares.delete(t):this._middlewares=new Map}},{key:"on",value:function(t,e){var n=this,r=2<arguments.length&&void 0!==arguments[2]&&arguments[2];if(Array.isArray(t))t.forEach(function(t){return n.on(t,e)});else{var i=(t=t.toString()).split(/,|, | /);1<i.length?i.forEach(function(t){return n.on(t,e)}):(Array.isArray(this._listeners.get(t))||this._listeners.set(t,[]),this._listeners.get(t).push({once:r,callback:e}))}}},{key:"once",value:function(t,e){this.on(t,e,!0)}},{key:"emit",value:function(n,r){var i=this,o=2<arguments.length&&void 0!==arguments[2]&&arguments[2];n=n.toString();var u=this._listeners.get(n),l=null,a=0,s=o;if(Array.isArray(u))for(u.forEach(function(t,e){o||(l=i._middlewares.get(n),Array.isArray(l)?(l.forEach(function(t){t(r,function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:null;null!==t&&(r=t),a++},n)}),a>=l.length&&(s=!0)):s=!0),s&&(t.once&&(u[e]=null),t.callback(r))});-1!==u.indexOf(null);)u.splice(u.indexOf(null),1)}}]),e}();e.a=i}]).default});
\ No newline at end of file
diff --git a/package.json b/package.json
index c8a5f94..bc35232 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bulma-slider",
-  "version": "2.0.3",
+  "version": "2.0.4",
   "description": "Display classic slider more sexy, in different colors, sizes, and states ",
   "main": "dist/js/bulma-slider.min.js",
   "style": "dist/css/bulma-slider.min.css",
diff --git a/src/js/index.js b/src/js/index.js
index 7bfd3a8..447991a 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -75,7 +75,7 @@ export default class bulmaSlider extends EventEmitter {
     let result = null;
     const outputs = document.getElementsByTagName('output') || [];
     
-    outputs.forEach(output => {
+    Array.from(outputs).forEach(output => {
       if (output.htmlFor == this.element.getAttribute('id')) {
         result = output;
         return true;
diff --git a/test/index.html b/test/index.html
index 371bfe5..c4924fd 100644
--- a/test/index.html
+++ b/test/index.html
@@ -20,6 +20,14 @@
     <input class="slider is-fullwidth is-danger" step="1" min="0" max="100" value="50" type="range">
 
     <input class="slider is-fullwidth is-info" step="1" min="0" max="100" value="50" type="range">
+
+    <input id="sliderWithValue" class="slider has-output is-fullwidth" min="0" max="100" value="50" step="1" type="range">
+    <output for="sliderWithValue">50</output>
+
+    <script src="js/bulma-slider.min.js"></script>
+    <script>
+        bulmaSlider.attach();
+    </script>
 </body>
 
 </html>
\ No newline at end of file
diff --git a/test/js/bulma-slider.min.js b/test/js/bulma-slider.min.js
new file mode 100644
index 0000000..7e62685
--- /dev/null
+++ b/test/js/bulma-slider.min.js
@@ -0,0 +1 @@
+!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.bulmaSlider=e():t.bulmaSlider=e()}("undefined"!=typeof self?self:this,function(){return function(n){var r={};function i(t){if(r[t])return r[t].exports;var e=r[t]={i:t,l:!1,exports:{}};return n[t].call(e.exports,e,e.exports,i),e.l=!0,e.exports}return i.m=n,i.c=r,i.d=function(t,e,n){i.o(t,e)||Object.defineProperty(t,e,{configurable:!1,enumerable:!0,get:n})},i.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return i.d(e,"a",e),e},i.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},i.p="",i(i.s=0)}([function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0}),n.d(e,"isString",function(){return l});var r=n(1),i=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n=arguments[e];for(var r in n)Object.prototype.hasOwnProperty.call(n,r)&&(t[r]=n[r])}return t},u=function(){function r(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}return function(t,e,n){return e&&r(t.prototype,e),n&&r(t,n),t}}(),o="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t};var l=function(t){return"string"==typeof t||!!t&&"object"===(void 0===t?"undefined":o(t))&&"[object String]"===Object.prototype.toString.call(t)},a=function(t){function o(t){var e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{};!function(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}(this,o);var n=function(t,e){if(!t)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return!e||"object"!=typeof e&&"function"!=typeof e?t:e}(this,(o.__proto__||Object.getPrototypeOf(o)).call(this));if(n.element="string"==typeof t?document.querySelector(t):t,!n.element)throw new Error("An invalid selector or non-DOM node has been provided.");return n._clickEvents=["click"],n.options=i({},e),n.onSliderInput=n.onSliderInput.bind(n),n.init(),n}return function(t,e){if("function"!=typeof e&&null!==e)throw new TypeError("Super expression must either be null or a function, not "+typeof e);t.prototype=Object.create(e&&e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}}),e&&(Object.setPrototypeOf?Object.setPrototypeOf(t,e):t.__proto__=e)}(o,r["a"]),u(o,[{key:"init",value:function(){if(this._id="bulmaSlider"+(new Date).getTime()+Math.floor(Math.random()*Math.floor(9999)),this.output=this._findOutputForSlider(),this._bindEvents(),this.output&&this.element.classList.contains("has-output-tooltip")){var t=this._getSliderOutputPosition();this.output.style.left=t.position}this.emit("bulmaslider:ready",this.element.value)}},{key:"_findOutputForSlider",value:function(){var e=this,n=null,t=document.getElementsByTagName("output")||[];return Array.from(t).forEach(function(t){if(t.htmlFor==e.element.getAttribute("id"))return n=t,!0}),n}},{key:"_getSliderOutputPosition",value:function(){var t,e=window.getComputedStyle(this.element,null),n=parseInt(e.getPropertyValue("width"),10);t=this.element.getAttribute("min")?this.element.getAttribute("min"):0;var r=(this.element.value-t)/(this.element.getAttribute("max")-t);return{position:(r<0?0:1<r?n:n*r)+"px"}}},{key:"_bindEvents",value:function(){this.output&&this.element.addEventListener("input",this.onSliderInput,!1)}},{key:"onSliderInput",value:function(t){if(t.preventDefault(),this.element.classList.contains("has-output-tooltip")){var e=this._getSliderOutputPosition();this.output.style.left=e.position}var n=this.output.hasAttribute("data-prefix")?this.output.getAttribute("data-prefix"):"",r=this.output.hasAttribute("data-postfix")?this.output.getAttribute("data-postfix"):"";this.output.value=n+this.element.value+r,this.emit("bulmaslider:ready",this.element.value)}}],[{key:"attach",value:function(){var n=this,t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:'input[type="range"].slider',r=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{},i=new Array;return(l(t)?document.querySelectorAll(t):Array.isArray(t)?t:[t]).forEach(function(t){if(void 0===t[n.constructor.name]){var e=new o(t,r);t[n.constructor.name]=e,i.push(e)}else i.push(t[n.constructor.name])}),i}}]),o}();e.default=a},function(t,e,n){"use strict";var r=function(){function r(t,e){for(var n=0;n<e.length;n++){var r=e[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(t,r.key,r)}}return function(t,e,n){return e&&r(t.prototype,e),n&&r(t,n),t}}();var 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