diff --git a/app/assets/javascripts/cmtool/application.js.coffee b/app/assets/javascripts/cmtool/application.js.coffee
index 0f072f4..f0e9066 100644
--- a/app/assets/javascripts/cmtool/application.js.coffee
+++ b/app/assets/javascripts/cmtool/application.js.coffee
@@ -6,6 +6,7 @@
 #= require ace/theme-monokai
 #= require ace/mode-coffee
 #= require ace/mode-handlebars
+#= require ace/mode-json
 #= require ace/mode-yaml
 #= require ace/mode-haml
 #= require ace/mode-slim