diff --git a/packages/backend/src/core/chart/ChartManagementService.ts b/packages/backend/src/core/chart/ChartManagementService.ts
index 79681370a..f04c56106 100644
--- a/packages/backend/src/core/chart/ChartManagementService.ts
+++ b/packages/backend/src/core/chart/ChartManagementService.ts
@@ -58,9 +58,9 @@ export class ChartManagementService implements OnApplicationShutdown {
 	@bindThis
 	public async start() {
 		// 20分おきにメモリ情報をDBに書き込み
-		this.saveIntervalId = setInterval(() => {
+		this.saveIntervalId = setInterval(async () => {
 			for (const chart of this.charts) {
-				chart.save();
+				await chart.save();
 			}
 		}, 1000 * 60 * 20);
 	}
@@ -69,9 +69,9 @@ export class ChartManagementService implements OnApplicationShutdown {
 	public async dispose(): Promise<void> {
 		clearInterval(this.saveIntervalId);
 		if (process.env.NODE_ENV !== 'test') {
-			await Promise.all(
-				this.charts.map(chart => chart.save()),
-			);
+			for (const chart of this.charts) {
+				await chart.save();
+			}
 		}
 	}
 
diff --git a/packages/backend/src/queue/processors/CleanChartsProcessorService.ts b/packages/backend/src/queue/processors/CleanChartsProcessorService.ts
index 110468801..19f98c0d5 100644
--- a/packages/backend/src/queue/processors/CleanChartsProcessorService.ts
+++ b/packages/backend/src/queue/processors/CleanChartsProcessorService.ts
@@ -48,20 +48,18 @@ export class CleanChartsProcessorService {
 	public async process(): Promise<void> {
 		this.logger.info('Clean charts...');
 
-		await Promise.all([
-			this.federationChart.clean(),
-			this.notesChart.clean(),
-			this.usersChart.clean(),
-			this.activeUsersChart.clean(),
-			this.instanceChart.clean(),
-			this.perUserNotesChart.clean(),
-			this.perUserPvChart.clean(),
-			this.driveChart.clean(),
-			this.perUserReactionsChart.clean(),
-			this.perUserFollowingChart.clean(),
-			this.perUserDriveChart.clean(),
-			this.apRequestChart.clean(),
-		]);
+		await this.federationChart.clean();
+		await this.notesChart.clean();
+		await this.usersChart.clean();
+		await this.activeUsersChart.clean();
+		await this.instanceChart.clean();
+		await this.perUserNotesChart.clean();
+		await this.perUserPvChart.clean();
+		await this.driveChart.clean();
+		await this.perUserReactionsChart.clean();
+		await this.perUserFollowingChart.clean();
+		await this.perUserDriveChart.clean();
+		await this.apRequestChart.clean();
 
 		this.logger.succ('All charts successfully cleaned.');
 	}
diff --git a/packages/backend/src/queue/processors/ResyncChartsProcessorService.ts b/packages/backend/src/queue/processors/ResyncChartsProcessorService.ts
index 570cdf9a7..46e1adf17 100644
--- a/packages/backend/src/queue/processors/ResyncChartsProcessorService.ts
+++ b/packages/backend/src/queue/processors/ResyncChartsProcessorService.ts
@@ -31,11 +31,9 @@ export class ResyncChartsProcessorService {
 
 		// TODO: ユーザーごとのチャートも更新する
 		// TODO: インスタンスごとのチャートも更新する
-		await Promise.all([
-			this.driveChart.resync(),
-			this.notesChart.resync(),
-			this.usersChart.resync(),
-		]);
+		await this.driveChart.resync();
+		await this.notesChart.resync();
+		await this.usersChart.resync();
 
 		this.logger.succ('All charts successfully resynced.');
 	}
diff --git a/packages/backend/src/queue/processors/TickChartsProcessorService.ts b/packages/backend/src/queue/processors/TickChartsProcessorService.ts
index 93ec34162..c09cbccc5 100644
--- a/packages/backend/src/queue/processors/TickChartsProcessorService.ts
+++ b/packages/backend/src/queue/processors/TickChartsProcessorService.ts
@@ -48,20 +48,18 @@ export class TickChartsProcessorService {
 	public async process(): Promise<void> {
 		this.logger.info('Tick charts...');
 
-		await Promise.all([
-			this.federationChart.tick(false),
-			this.notesChart.tick(false),
-			this.usersChart.tick(false),
-			this.activeUsersChart.tick(false),
-			this.instanceChart.tick(false),
-			this.perUserNotesChart.tick(false),
-			this.perUserPvChart.tick(false),
-			this.driveChart.tick(false),
-			this.perUserReactionsChart.tick(false),
-			this.perUserFollowingChart.tick(false),
-			this.perUserDriveChart.tick(false),
-			this.apRequestChart.tick(false),
-		]);
+		await this.federationChart.tick(false);
+		await this.notesChart.tick(false);
+		await this.usersChart.tick(false);
+		await this.activeUsersChart.tick(false);
+		await this.instanceChart.tick(false);
+		await this.perUserNotesChart.tick(false);
+		await this.perUserPvChart.tick(false);
+		await this.driveChart.tick(false);
+		await this.perUserReactionsChart.tick(false);
+		await this.perUserFollowingChart.tick(false);
+		await this.perUserDriveChart.tick(false);
+		await this.apRequestChart.tick(false);
 
 		this.logger.succ('All charts successfully ticked.');
 	}