diff --git a/arcseekbar/src/main/java/com/king/view/arcseekbar/ArcSeekBar.java b/arcseekbar/src/main/java/com/king/view/arcseekbar/ArcSeekBar.java
index c0391e2..06e8c64 100644
--- a/arcseekbar/src/main/java/com/king/view/arcseekbar/ArcSeekBar.java
+++ b/arcseekbar/src/main/java/com/king/view/arcseekbar/ArcSeekBar.java
@@ -850,6 +850,7 @@ private float getRatio() {
     public void setMax(int max) {
         if (max > 0) {
             this.mMax = max;
+            mProgressPercent = (int) (mProgress * 100.0f / mMax);
             invalidate();
         }
     }