     @setState update @state,
       $set:
         max_team_size: parseInt(e.target.value)
+
+  updateUsernameBlacklist: (e) ->
+    @setState update @state,
+      $set:
+        username_blacklist: e.target.value.split('\n')
 
   pushUpdates: ->
     data = {

      competition_url: ""
      enable_feedback: true
      max_team_size: 1
      email:
        email_verification: false
        parent_verification_email: false

      start_time: new Date(@state.start_time).toISOString()
      end_time: new Date(@state.end_time).toISOString()
      max_team_size: @state.max_team_size
      username_blacklist: @state.username_blacklist
    }
    apiCall "PATCH", "/api/v1/settings", data
    .success ((data) ->
