diff --git a/index.js b/index.js
index cd758fd..ecb4dcc 100644
--- a/index.js
+++ b/index.js
@@ -280,10 +280,12 @@ export const Classes = {
 		complete: 'complete',
 		completion: 'completion',
 		discussionActivity: 'discussion-activity',
+		empty: 'empty',
 		exempt: 'exempt',
 		feedbackDate: 'feedback-date',
 		fileActivity: 'file-activity',
 		incomplete: 'incomplete',
+		overLimit: 'over-limit',
 		questionActivity: 'question-activity',
 		questionAttemptActivity: 'attempt-question-activity',
 		questionVersionActivity: 'question-version-activity',