diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/can/charge/event/ChargeEventService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/can/charge/event/ChargeEventService.kt
index 7a8ff3e..ba53b6e 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/can/charge/event/ChargeEventService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/can/charge/event/ChargeEventService.kt
@@ -89,7 +89,7 @@ class ChargeEventService(
     }
 
     private fun applyFirstChargeEvent(charge: Charge, member: Member) {
-        val additionalCan = ceil(charge.chargeCan * 0.2).toInt()
+        val additionalCan = ceil(charge.chargeCan * 0.15).toInt()
         applyEvent(
             additionalCan = additionalCan,
             member = member,