diff --git a/examples/simple-ecommerce/customize/custom-relation-tree_toOne.js b/examples/simple-ecommerce/customize/custom-relation-tree_toOne.js
index 656ee3b2..2b12ddee 100644
--- a/examples/simple-ecommerce/customize/custom-relation-tree_toOne.js
+++ b/examples/simple-ecommerce/customize/custom-relation-tree_toOne.js
@@ -31,7 +31,7 @@ export default class RelationTree extends PureComponent {
     this.fetchData();
   }
 
-  UNSAFE_componentWillUnmount() {
+  componentWillUnmount() {
     if (this.subscription) {
       this.subscription.unsubscribe();
     }