diff --git a/line.js b/line.js
index 799b32d..cc0073b 100644
--- a/line.js
+++ b/line.js
@@ -13,20 +13,19 @@ const data = [
 ];
 const chart = new Chart({
   container: 'container',
-  forceFit: true,
+  autoFit: true,
   height: 500
 });
-chart.source(data);
+chart.data(data);
 chart.scale('value', {
-  min: 0
+  min: 0,
+  nice: true, // 4.0 中 scale 中 `nice` 属性默认为 false.
 });
 chart.scale('year', {
   range: [0, 1]
 });
 chart.tooltip({
-  crosshairs: {
-    type: 'line'
-  }
+  showCrosshairs: true,
 });
 chart.line().position('year*value');
 chart.point().position('year*value')
diff --git a/stack-column.js b/stack-column.js
index 8d9c0b9..b889a2d 100644
--- a/stack-column.js
+++ b/stack-column.js
@@ -17,11 +17,11 @@ dv.transform({
 
 const chart = new Chart({
   container: 'container',
-  forceFit: true,
+  autoFit: true,
   height: 500
 });
-chart.source(dv);
-chart.intervalStack()
+chart.data(dv.rows);
+chart.interval().adjust('stack')
   .position('月份*月均降雨量')
   .color('name');
 chart.render();