diff --git a/examples/ol3.html b/examples/ol3.html
index 33f70b1..b052b1c 100644
--- a/examples/ol3.html
+++ b/examples/ol3.html
@@ -6,7 +6,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
 
     <link href="//maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css" rel="stylesheet">
-    <link rel="stylesheet" href="//openlayers.org/en/v4.6.5/css/ol.css" type="text/css">
+    <link rel="stylesheet" href="//cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.1.1/css/ol.css" type="text/css">
 
     <link rel="stylesheet" href="../css/ol3-sidebar.css" />
 
@@ -81,7 +81,7 @@ <h1 class="sidebar-header">Settings<span class="sidebar-close"><i class="fa fa-c
 
     <a href="https://github.com/Turbo87/sidebar-v2/"><img style="position: fixed; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a>
 
-    <script src="//openlayers.org/en/v4.6.5/build/ol.js" type="text/javascript"></script>
+    <script src="//cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.1.1/build/ol.js"></script>
     <script src="../js/ol3-sidebar.js"></script>
 
     <script>
diff --git a/js/ol3-sidebar.js b/js/ol3-sidebar.js
index d0ffd75..fc0fae2 100644
--- a/js/ol3-sidebar.js
+++ b/js/ol3-sidebar.js
@@ -47,7 +47,12 @@ ol.control.Sidebar = function (settings) {
     }
 };
 
-ol.inherits(ol.control.Sidebar, ol.control.Control);
+if ('inherits' in ol) {
+    ol.inherits(ol.control.Sidebar, ol.control.Control);
+} else {
+    ol.control.Sidebar.prototype = Object.create(ol.control.Control.prototype);
+    ol.control.Sidebar.prototype.constructor = ol.control.Sidebar;
+}
 
 ol.control.Sidebar.prototype.setMap = function(map) {
     var i, child;
diff --git a/js/ol3-sidebar.min.js b/js/ol3-sidebar.min.js
index 74b6394..e05cf53 100644
--- a/js/ol3-sidebar.min.js
+++ b/js/ol3-sidebar.min.js
@@ -1 +1 @@
-ol.control.Sidebar=function(t){var s,e;for(this._options=Object.assign({},{element:null,position:"left"},t),ol.control.Control.call(this,{element:document.getElementById(this._options.element),target:this._options.target}),this.element.classList.add("sidebar-"+this._options.position),s=this.element.children.length-1;0<=s;s--)"DIV"===(e=this.element.children[s]).tagName&&e.classList.contains("sidebar-content")&&(this._container=e);for(this._tabitems=this.element.querySelectorAll("ul.sidebar-tabs > li, .sidebar-tabs > ul > li"),s=this._tabitems.length-1;0<=s;s--)this._tabitems[s]._sidebar=this;for(this._panes=[],this._closeButtons=[],s=this._container.children.length-1;0<=s;s--)if("DIV"==(e=this._container.children[s]).tagName&&e.classList.contains("sidebar-pane")){this._panes.push(e);for(var i=e.querySelectorAll(".sidebar-close"),o=0,l=i.length;o<l;o++)this._closeButtons.push(i[o])}},ol.inherits(ol.control.Sidebar,ol.control.Control),ol.control.Sidebar.prototype.setMap=function(t){var s,e;for(s=this._tabitems.length-1;0<=s;s--){var i=(e=this._tabitems[s]).querySelector("a");i.hasAttribute("href")&&"#"==i.getAttribute("href").slice(0,1)&&(i.onclick=this._onClick.bind(e))}for(s=this._closeButtons.length-1;0<=s;s--)(e=this._closeButtons[s]).onclick=this._onCloseClick.bind(this)},ol.control.Sidebar.prototype.open=function(t){var s,e;for(s=this._panes.length-1;0<=s;s--)(e=this._panes[s]).id==t?e.classList.add("active"):e.classList.contains("active")&&e.classList.remove("active");for(s=this._tabitems.length-1;0<=s;s--)(e=this._tabitems[s]).querySelector("a").hash=="#"+t?e.classList.add("active"):e.classList.contains("active")&&e.classList.remove("active");return this.element.classList.contains("collapsed")&&this.element.classList.remove("collapsed"),this},ol.control.Sidebar.prototype.close=function(){for(var t=this._tabitems.length-1;0<=t;t--){var s=this._tabitems[t];s.classList.contains("active")&&s.classList.remove("active")}return this.element.classList.contains("collapsed")||this.element.classList.add("collapsed"),this},ol.control.Sidebar.prototype._onClick=function(t){t.preventDefault(),this.classList.contains("active")?this._sidebar.close():this.classList.contains("disabled")||this._sidebar.open(this.querySelector("a").hash.slice(1))},ol.control.Sidebar.prototype._onCloseClick=function(){this.close()};
\ No newline at end of file
+ol.control.Sidebar=function(t){var e,s;for(this._options=Object.assign({},{element:null,position:"left"},t),ol.control.Control.call(this,{element:document.getElementById(this._options.element),target:this._options.target}),this.element.classList.add("sidebar-"+this._options.position),e=this.element.children.length-1;0<=e;e--)"DIV"===(s=this.element.children[e]).tagName&&s.classList.contains("sidebar-content")&&(this._container=s);for(this._tabitems=this.element.querySelectorAll("ul.sidebar-tabs > li, .sidebar-tabs > ul > li"),e=this._tabitems.length-1;0<=e;e--)this._tabitems[e]._sidebar=this;for(this._panes=[],this._closeButtons=[],e=this._container.children.length-1;0<=e;e--)if("DIV"==(s=this._container.children[e]).tagName&&s.classList.contains("sidebar-pane")){this._panes.push(s);for(var i=s.querySelectorAll(".sidebar-close"),o=0,l=i.length;o<l;o++)this._closeButtons.push(i[o])}},"inherits"in ol?ol.inherits(ol.control.Sidebar,ol.control.Control):(ol.control.Sidebar.prototype=Object.create(ol.control.Control.prototype),ol.control.Sidebar.prototype.constructor=ol.control.Sidebar),ol.control.Sidebar.prototype.setMap=function(t){var e,s;for(e=this._tabitems.length-1;0<=e;e--){var i=(s=this._tabitems[e]).querySelector("a");i.hasAttribute("href")&&"#"==i.getAttribute("href").slice(0,1)&&(i.onclick=this._onClick.bind(s))}for(e=this._closeButtons.length-1;0<=e;e--)(s=this._closeButtons[e]).onclick=this._onCloseClick.bind(this)},ol.control.Sidebar.prototype.open=function(t){var e,s;for(e=this._panes.length-1;0<=e;e--)(s=this._panes[e]).id==t?s.classList.add("active"):s.classList.contains("active")&&s.classList.remove("active");for(e=this._tabitems.length-1;0<=e;e--)(s=this._tabitems[e]).querySelector("a").hash=="#"+t?s.classList.add("active"):s.classList.contains("active")&&s.classList.remove("active");return this.element.classList.contains("collapsed")&&this.element.classList.remove("collapsed"),this},ol.control.Sidebar.prototype.close=function(){for(var t=this._tabitems.length-1;0<=t;t--){var e=this._tabitems[t];e.classList.contains("active")&&e.classList.remove("active")}return this.element.classList.contains("collapsed")||this.element.classList.add("collapsed"),this},ol.control.Sidebar.prototype._onClick=function(t){t.preventDefault(),this.classList.contains("active")?this._sidebar.close():this.classList.contains("disabled")||this._sidebar.open(this.querySelector("a").hash.slice(1))},ol.control.Sidebar.prototype._onCloseClick=function(){this.close()};
\ No newline at end of file