diff --git a/core/src/commonMain/kotlin/cn/rdlevel/rdkt/core/events/SetCountingSoundEvent.kt b/core/src/commonMain/kotlin/cn/rdlevel/rdkt/core/events/SetCountingSoundEvent.kt
index 63f4f3d..5bc883b 100644
--- a/core/src/commonMain/kotlin/cn/rdlevel/rdkt/core/events/SetCountingSoundEvent.kt
+++ b/core/src/commonMain/kotlin/cn/rdlevel/rdkt/core/events/SetCountingSoundEvent.kt
@@ -56,7 +56,7 @@ public class SetCountingSoundEvent private constructor(
      */
     public var volume: Int = 100
         set(value) {
-            require(value in 0..100) { "Volume must be between 0 and 100." }
+            require(value in 0..200) { "Volume must be between 0 and 200." }
             field = value
         }