diff --git a/playground/index.html b/playground/index.html
index df0cf5e3..57fb21dd 100644
--- a/playground/index.html
+++ b/playground/index.html
@@ -118,10 +118,15 @@ <h2>Generated form</h2>
     <script src="../deps/opt/spectrum.js"></script>
     <script src="../deps/opt/ace/ace.js"></script>
     <script src="../deps/opt/ace/mode-json.js"></script>
+    <script src="../deps/opt/ace/mode-html.js"></script>
+    <script src="../deps/opt/ace/mode-css.js"></script>
+    <script src="../deps/opt/ace/mode-javascript.js"></script>
+    <script src="../deps/opt/ace/mode-less.js"></script>
+    <script src="../deps/opt/ace/mode-markdown.js"></script>
     <script src="../deps/opt/jquery.transloadit2.js"></script>
 
     <script src="../lib/jsonform.js"></script>
 
     <script src="playground.js"></script>
   </body>
-</html>
\ No newline at end of file
+</html>