diff --git a/code/Extension/UpgradePolymorphicExtension.php b/code/Extension/UpgradePolymorphicExtension.php
index 2221234..81dac23 100644
--- a/code/Extension/UpgradePolymorphicExtension.php
+++ b/code/Extension/UpgradePolymorphicExtension.php
@@ -47,7 +47,7 @@ class UpgradePolymorphicExtension extends DataExtension
      */
     protected $defaultReplacement = UserDefinedForm::class;
 
-    public function requireDefaultRecords()
+    protected function onRequireDefaultRecords()
     {
         if (!UserDefinedForm::config()->get('upgrade_on_build')) {
             return;