diff --git a/packages/core/dev/main.js b/packages/core/dev/main.js
index 4597895..acd544c 100644
--- a/packages/core/dev/main.js
+++ b/packages/core/dev/main.js
@@ -31,3 +31,8 @@ const core = new Core(
   }
 );
 core.setData(data);
+
+const elem1 = core.getData().elements[1];
+elem1.desc.text = 'Updated';
+
+core.updateElement(elem1);
diff --git a/packages/core/src/mixins/element.ts b/packages/core/src/mixins/element.ts
index 5f8b010..8e86144 100644
--- a/packages/core/src/mixins/element.ts
+++ b/packages/core/src/mixins/element.ts
@@ -62,6 +62,7 @@ export function updateElement(
         resourceChangeUUIDs.push(result);
       }
       data.elements[i] = _elem;
+      core.setData(data);
       break;
     }
   }