diff --git a/packages/backend/migration/1713956400000-TmsFttDisabledByDefault.js b/packages/backend/migration/1713956400000-TmsFttDisabledByDefault.js
new file mode 100644
index 000000000000..28d93da35a03
--- /dev/null
+++ b/packages/backend/migration/1713956400000-TmsFttDisabledByDefault.js
@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class TmsFttDisabledByDefault1713956400000 {
+    name = 'TmsFttDisabledByDefault1713956400000'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "meta" ALTER COLUMN "enableFanoutTimeline" SET DEFAULT false`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "meta" ALTER COLUMN "enableFanoutTimeline" SET DEFAULT true`);
+    }
+}
diff --git a/packages/backend/src/models/Meta.ts b/packages/backend/src/models/Meta.ts
index a28edc39642e..44b26702e63d 100644
--- a/packages/backend/src/models/Meta.ts
+++ b/packages/backend/src/models/Meta.ts
@@ -549,7 +549,7 @@ export class MiMeta {
 	public preservedUsernames: string[];
 
 	@Column('boolean', {
-		default: true,
+		default: false,
 	})
 	public enableFanoutTimeline: boolean;