diff --git a/content/Math4201/_meta.js b/content/Math4201/_meta.js
index ef18267..baf4154 100644
--- a/content/Math4201/_meta.js
+++ b/content/Math4201/_meta.js
@@ -14,4 +14,5 @@ export default {
     Math4201_L9: "Topology I (Lecture 9)",
     Math4201_L10: "Topology I (Lecture 10)",
     Math4201_L11: "Topology I (Lecture 11)",
+    Math4201_L12: "Topology I (Lecture 12)",
 }