diff --git a/src/main/kotlin/org/gitanimals/render/domain/UserStatisticService.kt b/src/main/kotlin/org/gitanimals/render/domain/UserStatisticService.kt
index d810762..a745ef5 100644
--- a/src/main/kotlin/org/gitanimals/render/domain/UserStatisticService.kt
+++ b/src/main/kotlin/org/gitanimals/render/domain/UserStatisticService.kt
@@ -10,9 +10,9 @@ class UserStatisticService(
 ) {
 
     fun getYesterdayUserCount(): Int {
-        val current = LocalDate.now()
-        val startDay = current.atTime(0, 0, 0).toInstant(ZoneOffset.UTC)
-        val endDay = current.atTime(23, 59, 59).toInstant(ZoneOffset.UTC)
+        val yesterday = LocalDate.now().minusDays(1)
+        val startDay = yesterday.atTime(0, 0, 0).toInstant(ZoneOffset.UTC)
+        val endDay = yesterday.atTime(23, 59, 59).toInstant(ZoneOffset.UTC)
         return userStatisticRepository.getDailyUserCount(startDay, endDay)
     }