diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 2b3e2c864..09f672be7 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -658,7 +658,14 @@ async function post(ev?: MouseEvent) {
 			if ((text.includes('love') || text.includes('❤')) && text.includes('misskey')) {
 				claimAchievement('iLoveMisskey');
 			}
-			if (text.includes('Efrlqw8ytg4'.toLowerCase()) || text.includes('XVCwzwxdHuA'.toLowerCase())) {
+			if (
+				text.includes('https://youtu.be/Efrlqw8ytg4'.toLowerCase()) ||
+				text.includes('https://www.youtube.com/watch?v=Efrlqw8ytg4'.toLowerCase()) ||
+				text.includes('https://m.youtube.com/watch?v=Efrlqw8ytg4'.toLowerCase()) ||
+				text.includes('https://youtu.be/XVCwzwxdHuA'.toLowerCase()) ||
+				text.includes('https://www.youtube.com/watch?v=XVCwzwxdHuA'.toLowerCase()) ||
+				text.includes('https://m.youtube.com/watch?v=XVCwzwxdHuA'.toLowerCase())
+			) {
 				claimAchievement('brainDiver');
 			}