diff --git a/src/com/fr/plugin/demo/DemoChart.java b/src/com/fr/plugin/demo/DemoChart.java
index 92c28b8..f6a843c 100644
--- a/src/com/fr/plugin/demo/DemoChart.java
+++ b/src/com/fr/plugin/demo/DemoChart.java
@@ -119,7 +119,7 @@ public class DemoChart extends AbstractChart<DemoDataConfig>{
 
     @ExecuteFunctionRecord
     @Override
-    protected void addJSON(DemoDataConfig dataConfig, JSONObject jsonObject, Repository repo) throws JSONException {
+    protected void addJSON(DemoDataConfig dataConfig, JSONObject jsonObject, Repository repo, JSONPara para) throws JSONException {
         jsonObject.put("theme", getThemeType() == ThemeType.DARK ? "dark" : "sth whatever");
 
         jsonObject.put("title", JSONFactory.createJSON(JSON.OBJECT).put("text", getTitleFormula().getResult()));