diff --git a/packages/backend/src/core/HashtagService.ts b/packages/backend/src/core/HashtagService.ts
index d50b781834..cc5ce4e964 100644
--- a/packages/backend/src/core/HashtagService.ts
+++ b/packages/backend/src/core/HashtagService.ts
@@ -177,29 +177,29 @@ export class HashtagService {
 		// チャート用
 		redisPipeline.pfadd(`hashtagUsers:${hashtag}:${window}`, userId);
 
-		const TTLwindow = await this.redisClient.ttl(`hashtagUsers:${hashtag}:${window}`);
-
-		if (TTLwindow === -1) {
-			redisPipeline.expire(`hashtagUsers:${hashtag}:${window}`,
-				60 * 60 * 24 * 3, // 3日間
-				//'NX', // "NX -- Set expiry only when the key has no expiry" = 有効期限がないときだけ設定
-			);
-		}
-
 		// ユニークカウント用
 		// TODO: Bloom Filter を使うようにしても良さそう
 		redisPipeline.sadd(`hashtagUsers:${hashtag}`, userId);
 
+		await redisPipeline.exec();
+
 		const TTL = await this.redisClient.ttl(`hashtagUsers:${hashtag}`);
 		
 		if (TTL === -1) {
-			redisPipeline.expire(`hashtagUsers:${hashtag}`,
+			this.redisClient.expire(`hashtagUsers:${hashtag}`,
 				60 * 60, // 1時間
 				//'NX', // "NX -- Set expiry only when the key has no expiry" = 有効期限がないときだけ設定
 			);
 		}
 
-		redisPipeline.exec();
+		const TTLwindow = await this.redisClient.ttl(`hashtagUsers:${hashtag}:${window}`);
+
+		if (TTLwindow === -1) {
+			this.redisClient.expire(`hashtagUsers:${hashtag}:${window}`,
+				60 * 60 * 24 * 3, // 3日間
+				//'NX', // "NX -- Set expiry only when the key has no expiry" = 有効期限がないときだけ設定
+			);
+		}
 	}
 
 	@bindThis