diff --git a/src/models/note.ts b/src/models/note.ts
index 62b1b3ecb1..bb600fc0cb 100644
--- a/src/models/note.ts
+++ b/src/models/note.ts
@@ -26,6 +26,21 @@ Note.createIndex({
 });
 export default Note;
 
+// 後方互換性のため
+Note.findOne({
+	fileIds: { $exists: true }
+}).then(n => {
+	if (n == null) {
+		Note.update({}, {
+			$rename: {
+				mediaIds: 'fileIds'
+			}
+		}, {
+			multi: true
+		});
+	}
+});
+
 export function isValidText(text: string): boolean {
 	return length(text.trim()) <= 1000 && text.trim() != '';
 }