diff --git a/library/src/main/java/com/wangjie/wavecompat/WaveDrawable.java b/library/src/main/java/com/wangjie/wavecompat/WaveDrawable.java
index bed9117..c886c37 100644
--- a/library/src/main/java/com/wangjie/wavecompat/WaveDrawable.java
+++ b/library/src/main/java/com/wangjie/wavecompat/WaveDrawable.java
@@ -80,7 +80,7 @@ public void startWaveAnimator() {
         waveAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
             @Override
             public void onAnimationUpdate(ValueAnimator animation) {
-                currentRadius = (int) animation.getAnimatedValue();
+                currentRadius = (Integer) animation.getAnimatedValue();
                 invalidateSelf();
             }
         });