diff --git a/demo/index-light.html b/demo/index-light.html
index 2a6b0c15568..b17091b70ee 100644
--- a/demo/index-light.html
+++ b/demo/index-light.html
@@ -15,7 +15,7 @@
     <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
     <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.8/FileSaver.min.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.15.2/ace.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.15.3/ace.js"></script>
   </head>
   <body>
     <div class="header-container">
diff --git a/demo/index.html b/demo/index.html
index 10c057af64e..e9e76162c19 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -15,7 +15,7 @@
     <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
     <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.8/FileSaver.min.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.15.2/ace.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.15.3/ace.js"></script>
   </head>
   <body>
     <div class="header-container">
