diff --git a/README.md b/README.md
index cfcee90..51d1af7 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ mNestedTouchScrollingLayout.registerNestScrollChildCallback(new NestedTouchScrol
         
         // 当前 Layout 偏移距离
 	@Override
-	public void onNestChildScrollChange(float deltaY) {
+	public void onNestChildScrollChange(float deltaY, float velocityY) {
 
 	}