diff --git a/src/DraggableList.js b/src/DraggableList.js
index 3aeeb59..0db236c 100644
--- a/src/DraggableList.js
+++ b/src/DraggableList.js
@@ -67,7 +67,7 @@ class DraggableGridView extends Component {
 
   get wrapperStyle() {
     const { itemsPerRow, itemHeight } = this.props;
-    const height = (Math.round(this.itemsLength / itemsPerRow) + 1) * itemHeight;
+    const height = (Math.floor(this.itemsLength / itemsPerRow) + 1) * itemHeight;
 
     return { height };
   }