diff --git a/library/src/main/java/com/silencedut/expandablelayout/ExpandableLayout.java b/library/src/main/java/com/silencedut/expandablelayout/ExpandableLayout.java
index 8183fb2..4c64ddf 100644
--- a/library/src/main/java/com/silencedut/expandablelayout/ExpandableLayout.java
+++ b/library/src/main/java/com/silencedut/expandablelayout/ExpandableLayout.java
@@ -96,14 +96,9 @@ private void verticalAnimate(final int startHeight, final int endHeight ) {
         final View target = getChildAt(1);
         mExpandAnimator = ValueAnimator.ofInt(startHeight,endHeight);
         mExpandAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
-            //private IntEvaluator intEvaluator = new IntEvaluator();
-            int lastHeight=0;
             @Override
             public void onAnimationUpdate(ValueAnimator animation) {
-                int height = (int) animation.getAnimatedValue();
-                int scrollStep = height-lastHeight;
-                lastHeight=height;
-                target.getLayoutParams().height=height;
+                target.getLayoutParams().height= ( int) animation.getAnimatedValue();
                 target.requestLayout();
             }
         });