diff --git a/migration/1597385880794-add-sensitive-index.ts b/migration/1597385880794-add-sensitive-index.ts
new file mode 100644
index 000000000..ff6251ac0
--- /dev/null
+++ b/migration/1597385880794-add-sensitive-index.ts
@@ -0,0 +1,14 @@
+import {MigrationInterface, QueryRunner} from "typeorm";
+
+export class addSensitiveIndex1597385880794 implements MigrationInterface {
+    name = 'addSensitiveIndex1597385880794'
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`CREATE INDEX "IDX_a7eba67f8b3fa27271e85d2e26" ON "drive_file" ("isSensitive") `);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`DROP INDEX "IDX_a7eba67f8b3fa27271e85d2e26"`);
+    }
+
+}
diff --git a/src/models/entities/drive-file.ts b/src/models/entities/drive-file.ts
index c02b9f363..680a40bc0 100644
--- a/src/models/entities/drive-file.ts
+++ b/src/models/entities/drive-file.ts
@@ -145,6 +145,7 @@ export class DriveFile {
 	@JoinColumn()
 	public folder: DriveFolder | null;
 
+	@Index()
 	@Column('boolean', {
 		default: false,
 		comment: 'Whether the DriveFile is NSFW.'