diff --git a/src/main/java/chzzk/grassdiary/domain/diary/service/DiaryService.java b/src/main/java/chzzk/grassdiary/domain/diary/service/DiaryService.java
index 2f1e0759..579efedc 100644
--- a/src/main/java/chzzk/grassdiary/domain/diary/service/DiaryService.java
+++ b/src/main/java/chzzk/grassdiary/domain/diary/service/DiaryService.java
@@ -30,6 +30,7 @@
 import java.util.List;
 import java.util.Random;
 
+import java.util.concurrent.ThreadLocalRandom;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.data.domain.Page;
@@ -213,9 +214,7 @@ private void updateTags(Diary diary, List<String> newHashtags) {
     }
 
     private int makeRewardPoint() {
-        long seed = System.currentTimeMillis();
-        Random random = new Random(seed);
-        return 50 + (random.nextInt(6) * 10);
+        return 50 + (ThreadLocalRandom.current().nextInt(6) * 10);
     }
 
     private void saveRewardPointAndHistory(Member member, int rewardPoint) {