diff --git a/app/views/submissions/edit.html.haml b/app/views/submissions/edit.html.haml
--- a/app/views/submissions/edit.html.haml
+++ b/app/views/submissions/edit.html.haml
@@ -35,7 +35,7 @@
                 = file_field_tag 'load_file'
             = text_field_tag '' , nil, {readonly: true, class: 'form-control'}
         .form-group
-          = submit_tag 'Submit', class: 'btn btn-success', id: 'live_submit', 
+          = submit_tag 'Submit', class: 'btn ' + (@submission && @submission.number >= 100 ? 'golden-btn' : 'btn-success'), id: 'live_submit', 
             data: {confirm: "Submitting this source code for task #{@problem.long_name}?"}
       - # latest submission status
       .panel{class: (@submission && @submission.graded_at) ? "panel-info" : "panel-warning"}