diff --git a/slidify.js b/slidify.js
index d5aa87b..6b78bd6 100644
--- a/slidify.js
+++ b/slidify.js
@@ -140,7 +140,9 @@ function createTopicList() {
 	topicList.style.width = '800px';
 	topicList.style.boxShadow = '0 5px 15px	rgba(0, 0, 0, 0.3)';
 	topicList.style.maxHeight = 'calc(100vh - 8rem)';
+	topicList.style.boxSizing = 'border-box';
 	topicList.style.visibility = 'hidden';
+	topicList.style.overflowY = 'scroll';
 
 	topicList.querySelectorAll('a').forEach(link => {
 		link.addEventListener('click', e => topicList.style.visibility = 'hidden');