diff --git a/src/Forms/CompositeValidator.php b/src/Forms/CompositeValidator.php
index 2efbf5c6e..429ddc450 100644
--- a/src/Forms/CompositeValidator.php
+++ b/src/Forms/CompositeValidator.php
@@ -26,7 +26,7 @@ use SilverStripe\ORM\ValidationResult;
  *
  * Or by implementing the updateCMSCompositeValidator() method in a DataExtension:
  *
- * public function updateCMSCompositeValidator(CompositeValidator $compositeValidator): void
+ * protected function updateCMSCompositeValidator(CompositeValidator $compositeValidator): void
  * {
  *   $compositeValidator->addValidator(RequiredFields::create(['AdditionalContent']));
  * }
diff --git a/src/ORM/DataExtension.php b/src/ORM/DataExtension.php
index 6d8a61d80..b88ec93d3 100644
--- a/src/ORM/DataExtension.php
+++ b/src/ORM/DataExtension.php
@@ -35,7 +35,7 @@ abstract class DataExtension extends Extension
      * @param SQLSelect $query Query to augment.
      * @param DataQuery $dataQuery Container DataQuery for this SQLSelect
      */
-    public function augmentSQL(SQLSelect $query, DataQuery $dataQuery = null)
+    protected function augmentSQL(SQLSelect $query, DataQuery $dataQuery = null)
     {
     }
 
@@ -45,7 +45,7 @@ abstract class DataExtension extends Extension
      * When duplicating a table's structure, remember to duplicate the create options
      * as well. See {@link Versioned->augmentDatabase} for an example.
      */
-    public function augmentDatabase()
+    protected function augmentDatabase()
     {
     }
 
@@ -54,7 +54,7 @@ abstract class DataExtension extends Extension
      *
      * @param array $manipulation Array of operations to augment.
      */
-    public function augmentWrite(&$manipulation)
+    protected function augmentWrite(&$manipulation)
     {
     }
 
@@ -206,7 +206,7 @@ abstract class DataExtension extends Extension
      *
      * @param FieldList $fields FieldList with a contained TabSet
      */
-    public function updateCMSFields(FieldList $fields)
+    protected function updateCMSFields(FieldList $fields)
     {
     }
 
@@ -217,7 +217,7 @@ abstract class DataExtension extends Extension
      *
      * @param CompositeValidator $compositeValidator
      */
-    public function updateCMSCompositeValidator(CompositeValidator $compositeValidator): void
+    protected function updateCMSCompositeValidator(CompositeValidator $compositeValidator): void
     {
     }
 
@@ -229,7 +229,7 @@ abstract class DataExtension extends Extension
      *
      * @param FieldList $fields FieldList without TabSet nesting
      */
-    public function updateFrontEndFields(FieldList $fields)
+    protected function updateFrontEndFields(FieldList $fields)
     {
     }
 
@@ -239,7 +239,7 @@ abstract class DataExtension extends Extension
      *
      * @param FieldList $actions FieldList
      */
-    public function updateCMSActions(FieldList $actions)
+    protected function updateCMSActions(FieldList $actions)
     {
     }
 
@@ -251,7 +251,7 @@ abstract class DataExtension extends Extension
      *
      * @param array $fields Array of field names
      */
-    public function updateSummaryFields(&$fields)
+    protected function updateSummaryFields(&$fields)
     {
         $summary_fields = Config::inst()->get(static::class, 'summary_fields');
         if ($summary_fields) {
@@ -274,7 +274,7 @@ abstract class DataExtension extends Extension
      *
      * @param array $labels Array of field labels
      */
-    public function updateFieldLabels(&$labels)
+    protected function updateFieldLabels(&$labels)
     {
         $field_labels = Config::inst()->get(static::class, 'field_labels');
         if ($field_labels) {
diff --git a/src/ORM/DataObject.php b/src/ORM/DataObject.php
index cf5e1f195..f2d9740eb 100644
--- a/src/ORM/DataObject.php
+++ b/src/ORM/DataObject.php
@@ -4476,7 +4476,7 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
      * The framework extend method will return combined values from DataExtension method(s) as an array
      * The method on your DataExtension class should return a single scalar value. For example:
      *
-     * public function cacheKeyComponent()
+     * protected function cacheKeyComponent()
      * {
      *      return (string) $this->owner->MyColumn;
      * }