diff --git a/docs/js/upgrade.js b/docs/js/upgrade.js
index 3d25383..1cbb709 100644
--- a/docs/js/upgrade.js
+++ b/docs/js/upgrade.js
@@ -40,5 +40,5 @@ for (let upgrade of upgrades) {
 let cubesI = window.localStorage.getItem('cubes') * 1;
 
 for (let i = 0; i < cubesI; i++) {
-    addCube();
+    exec.addCube();
 }
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