3 files changed, 6 insertions, 10 deletions
diff --git a/web/arrow.js b/web/arrow.js
index 1fd2b3c00..5c09e2ce0 100644
--- a/web/arrow.js
+++ b/web/arrow.js
@@ -1,16 +1,12 @@
 goog.provide('ol.style.Arrow');
 
-goog.require('goog.asserts');
 goog.require('ol');
 goog.require('ol.color');
 goog.require('ol.dom');
 goog.require('ol.has');
 goog.require('ol.render.canvas');
-goog.require('ol.style.AtlasManager');
-goog.require('ol.style.Fill');
 goog.require('ol.style.Image');
 goog.require('ol.style.ImageState');
-goog.require('ol.style.Stroke');
 
 
 
@@ -25,7 +21,7 @@ goog.require('ol.style.Stroke');
  */
 ol.style.Arrow = function(options) {
 
-  goog.asserts.assert(options.radius !== undefined,
+  goog.DEBUG && console.assert(options.radius !== undefined,
       'must provide "radius"');
 
   /**
@@ -363,7 +359,7 @@ ol.style.Arrow.prototype.render_ = function(atlasManager) {
     var info = atlasManager.add(
         id, size, size, this.draw_.bind(this, renderOptions),
         renderHitDetectionCallback);
-    goog.asserts.assert(info, 'arrow size is too large');
+    goog.DEBUG && console.assert(info, 'arrow size is too large');
 
     this.canvas_ = info.image;
     this.origin_ = [info.offsetX, info.offsetY];
diff --git a/web/debug.html b/web/debug.html
index 319e813cc..ff42ac8d2 100644
--- a/web/debug.html
+++ b/web/debug.html
@@ -5,7 +5,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
 <title>Traccar</title>
 <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/extjs/6.0.1/classic/theme-neptune/resources/theme-neptune-all.css">
-<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/ol3/3.17.1/ol.css">
+<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/ol3/3.18.2/ol.css">
 <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css">
 <link rel="stylesheet" href="app.css">
 </head>
@@ -14,7 +14,7 @@
 <div id="attribution">Powered by <a href="https://www.traccar.org/">Traccar GPS Tracking System</a></div>
 <script src="//cdnjs.cloudflare.com/ajax/libs/extjs/6.0.1/ext-all-debug.js"></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/extjs/6.0.1/classic/theme-neptune/theme-neptune.js"></script>
-<script src="//cdnjs.cloudflare.com/ajax/libs/ol3/3.17.1/ol-debug.js"></script>
+<script src="//cdnjs.cloudflare.com/ajax/libs/ol3/3.18.2/ol-debug.js"></script>
 <script src="arrow.js"></script>
 <script type="text/javascript">
 Ext.Loader.setConfig({ disableCaching: false });
diff --git a/web/release.html b/web/release.html
index 9f396609e..3c9d9e111 100644
--- a/web/release.html
+++ b/web/release.html
@@ -5,7 +5,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
 <title>Traccar</title>
 <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/extjs/6.0.1/classic/theme-neptune/resources/theme-neptune-all.css">
-<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/ol3/3.17.1/ol.css">
+<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/ol3/3.18.2/ol.css">
 <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css">
 <link rel="stylesheet" href="app.css">
 </head>
@@ -14,7 +14,7 @@
 <div id="attribution">Powered by <a href="https://www.traccar.org/">Traccar GPS Tracking System</a></div>
 <script src="//cdnjs.cloudflare.com/ajax/libs/extjs/6.0.1/ext-all.js"></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/extjs/6.0.1/classic/theme-neptune/theme-neptune.js"></script>
-<script src="//cdnjs.cloudflare.com/ajax/libs/ol3/3.17.1/ol-debug.js"></script>
+<script src="//cdnjs.cloudflare.com/ajax/libs/ol3/3.18.2/ol-debug.js"></script>
 <script src="arrow.js"></script>
 <script src="locale.js"></script>
 <script type="text/javascript">