diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/v2/ranking/adapter/out/scheduler/CreatorRankingSnapshotScheduler.kt b/src/main/kotlin/kr/co/vividnext/sodalive/v2/ranking/adapter/out/scheduler/CreatorRankingSnapshotScheduler.kt
index e6220f08..cfcdcf38 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/v2/ranking/adapter/out/scheduler/CreatorRankingSnapshotScheduler.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/v2/ranking/adapter/out/scheduler/CreatorRankingSnapshotScheduler.kt
@@ -1,15 +1,29 @@
 package kr.co.vividnext.sodalive.v2.ranking.adapter.out.scheduler
 
 import kr.co.vividnext.sodalive.v2.ranking.application.CreatorRankingSnapshotRefreshService
+import org.redisson.api.RedissonClient
 import org.springframework.scheduling.annotation.Scheduled
 import org.springframework.stereotype.Component
+import java.util.concurrent.TimeUnit
 
 @Component
 class CreatorRankingSnapshotScheduler(
-    private val refreshService: CreatorRankingSnapshotRefreshService
+    private val refreshService: CreatorRankingSnapshotRefreshService,
+    private val redissonClient: RedissonClient
 ) {
-    @Scheduled(cron = "0 0 6 * * MON", zone = "Asia/Seoul")
+    @Scheduled(cron = "0 30 7 * * MON", zone = "Asia/Seoul")
     fun refreshLastCompletedWeek() {
-        refreshService.refreshLastCompletedWeek()
+        val lockName = "lock:creator-ranking-snapshot-refresh"
+        val lock = redissonClient.getLock(lockName)
+
+        try {
+            if (lock.tryLock(0, -1, TimeUnit.SECONDS)) {
+                refreshService.refreshLastCompletedWeek()
+            }
+        } finally {
+            if (lock.isHeldByCurrentThread) {
+                lock.unlock()
+            }
+        }
     }
 }
diff --git a/src/test/kotlin/kr/co/vividnext/sodalive/v2/ranking/application/CreatorRankingSnapshotRefreshServiceTest.kt b/src/test/kotlin/kr/co/vividnext/sodalive/v2/ranking/application/CreatorRankingSnapshotRefreshServiceTest.kt
index 3caf3960..a123e24a 100644
--- a/src/test/kotlin/kr/co/vividnext/sodalive/v2/ranking/application/CreatorRankingSnapshotRefreshServiceTest.kt
+++ b/src/test/kotlin/kr/co/vividnext/sodalive/v2/ranking/application/CreatorRankingSnapshotRefreshServiceTest.kt
@@ -9,10 +9,13 @@ import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Test
 import org.mockito.Mockito
+import org.redisson.api.RLock
+import org.redisson.api.RedissonClient
 import org.springframework.scheduling.annotation.Scheduled
 import java.time.LocalDateTime
 import java.time.ZoneId
 import java.time.ZonedDateTime
+import java.util.concurrent.TimeUnit
 
 class CreatorRankingSnapshotRefreshServiceTest {
     @Test
@@ -86,21 +89,64 @@ class CreatorRankingSnapshotRefreshServiceTest {
     }
 
     @Test
-    @DisplayName("주간 스냅샷 스케줄러는 매주 월요일 06:00 KST cron으로 갱신 서비스를 호출한다")
-    fun shouldScheduleWeeklySnapshotRefreshAtKstMondaySix() {
+    @DisplayName("주간 스냅샷 스케줄러는 매주 월요일 07:30 KST cron으로 갱신 서비스를 호출한다")
+    fun shouldScheduleWeeklySnapshotRefreshAtKstMondaySevenThirty() {
         val scheduled = CreatorRankingSnapshotScheduler::class.java
             .getDeclaredMethod("refreshLastCompletedWeek")
             .getAnnotation(Scheduled::class.java)
         val service = Mockito.mock(CreatorRankingSnapshotRefreshService::class.java)
-        val scheduler = CreatorRankingSnapshotScheduler(service)
+        val redissonClient = Mockito.mock(RedissonClient::class.java)
+        val lock = Mockito.mock(RLock::class.java)
+        Mockito.`when`(redissonClient.getLock("lock:creator-ranking-snapshot-refresh")).thenReturn(lock)
+        Mockito.`when`(lock.tryLock(0, -1, TimeUnit.SECONDS)).thenReturn(true)
+        Mockito.`when`(lock.isHeldByCurrentThread).thenReturn(true)
+        val scheduler = CreatorRankingSnapshotScheduler(service, redissonClient)
 
         scheduler.refreshLastCompletedWeek()
 
-        assertEquals("0 0 6 * * MON", scheduled.cron)
+        assertEquals("0 30 7 * * MON", scheduled.cron)
         assertEquals("Asia/Seoul", scheduled.zone)
         Mockito.verify(service).refreshLastCompletedWeek()
     }
 
+    @Test
+    @DisplayName("주간 스냅샷 스케줄러는 Redisson lock을 획득한 인스턴스만 갱신을 실행한다")
+    fun shouldRefreshLastCompletedWeekOnlyWhenRedissonLockAcquired() {
+        val service = Mockito.mock(CreatorRankingSnapshotRefreshService::class.java)
+        val redissonClient = Mockito.mock(RedissonClient::class.java)
+        val lock = Mockito.mock(RLock::class.java)
+        Mockito.`when`(redissonClient.getLock("lock:creator-ranking-snapshot-refresh")).thenReturn(lock)
+        Mockito.`when`(lock.tryLock(0, -1, TimeUnit.SECONDS)).thenReturn(true)
+        Mockito.`when`(lock.isHeldByCurrentThread).thenReturn(true)
+        val scheduler = CreatorRankingSnapshotScheduler(service, redissonClient)
+
+        scheduler.refreshLastCompletedWeek()
+
+        Mockito.verify(redissonClient).getLock("lock:creator-ranking-snapshot-refresh")
+        Mockito.verify(lock).tryLock(0, -1, TimeUnit.SECONDS)
+        Mockito.verify(service).refreshLastCompletedWeek()
+        Mockito.verify(lock).unlock()
+    }
+
+    @Test
+    @DisplayName("주간 스냅샷 스케줄러는 Redisson lock 획득 실패 시 갱신을 건너뛴다")
+    fun shouldSkipLastCompletedWeekRefreshWhenRedissonLockNotAcquired() {
+        val service = Mockito.mock(CreatorRankingSnapshotRefreshService::class.java)
+        val redissonClient = Mockito.mock(RedissonClient::class.java)
+        val lock = Mockito.mock(RLock::class.java)
+        Mockito.`when`(redissonClient.getLock("lock:creator-ranking-snapshot-refresh")).thenReturn(lock)
+        Mockito.`when`(lock.tryLock(0, -1, TimeUnit.SECONDS)).thenReturn(false)
+        Mockito.`when`(lock.isHeldByCurrentThread).thenReturn(false)
+        val scheduler = CreatorRankingSnapshotScheduler(service, redissonClient)
+
+        scheduler.refreshLastCompletedWeek()
+
+        Mockito.verify(redissonClient).getLock("lock:creator-ranking-snapshot-refresh")
+        Mockito.verify(lock).tryLock(0, -1, TimeUnit.SECONDS)
+        Mockito.verify(service, Mockito.never()).refreshLastCompletedWeek()
+        Mockito.verify(lock, Mockito.never()).unlock()
+    }
+
     private fun service(
         aggregationPort: CreatorRankingAggregationPort = FakeCreatorRankingAggregationPort(),
         snapshotPort: CreatorRankingSnapshotPort = FakeCreatorRankingSnapshotPort()