diff --git a/src/models/entities/instance.ts b/src/models/entities/instance.ts
index 977054263..52c5215f1 100644
--- a/src/models/entities/instance.ts
+++ b/src/models/entities/instance.ts
@@ -71,7 +71,7 @@ export class Instance {
 	/**
 	 * ドライブ使用量
 	 */
-	@Column('integer', {
+	@Column('bigint', {
 		default: 0,
 	})
 	public driveUsage: number;