diff --git a/docs/en/developer-documentation.md b/docs/en/developer-documentation.md
index 1c556cf..ab371a2 100644
--- a/docs/en/developer-documentation.md
+++ b/docs/en/developer-documentation.md
@@ -21,7 +21,7 @@ For instance, in order to add a new Page field to the report you could add an ex
     use SilverStripe\SiteWideContentReport\SiteWideContentReport;
 
 	class MyReportExtension extends Extension {
-		public function updateColumns($itemType, &$columns) {
+		protected function updateColumns($itemType, &$columns) {
 			if(itemType !== 'Pages') {
 				return;
 			}
@@ -68,7 +68,7 @@ use SilverStripe\GridfieldQueuedExport\Forms\GridFieldQueuedExportButton;
 
 class SitewideContentReportQueuedExportExtension extends Extension
 {
-    public function updateExportButton(GridFieldComponent &$exportButton)
+    protected function updateExportButton(GridFieldComponent &$exportButton)
     {
         $exportButton = new GridFieldQueuedExportButton('buttons-after-left');
     }
diff --git a/src/Model/SitewideContentReview.php b/src/Model/SitewideContentReview.php
index fb5d0e9..c946e99 100644
--- a/src/Model/SitewideContentReview.php
+++ b/src/Model/SitewideContentReview.php
@@ -19,7 +19,7 @@ class SitewideContentReview extends Extension
      * @param array $columns Columns
      * @return mixed
      */
-    public function updateColumns($itemType, &$columns)
+    protected function updateColumns($itemType, &$columns)
     {
         if ($itemType !== 'Pages') {
             return;
diff --git a/src/Model/SitewideContentSubsites.php b/src/Model/SitewideContentSubsites.php
index bfe1fdf..bb1ec00 100644
--- a/src/Model/SitewideContentSubsites.php
+++ b/src/Model/SitewideContentSubsites.php
@@ -20,7 +20,7 @@ class SitewideContentSubsites extends Extension
      * @param string $itemType (i.e 'Pages' or 'Files')
      * @param array  $columns  Columns
      */
-    public function updateColumns($itemType, &$columns)
+    protected function updateColumns($itemType, &$columns)
     {
         // Skip single subsite setups
         if (!Subsite::get()->count()) {
@@ -57,7 +57,7 @@ public function updateColumns($itemType, &$columns)
      * @param $record
      * @param $attributes
      */
-    public function updateRowAttributes($total, $index, $record, &$attributes)
+    protected function updateRowAttributes($total, $index, $record, &$attributes)
     {
         $attributes['data-subsite-id'] = $record->SubsiteID;
     }
diff --git a/src/Model/SitewideContentTaxonomy.php b/src/Model/SitewideContentTaxonomy.php
index 009efc2..716c02f 100644
--- a/src/Model/SitewideContentTaxonomy.php
+++ b/src/Model/SitewideContentTaxonomy.php
@@ -29,7 +29,7 @@ class SitewideContentTaxonomy extends Extension
      * @param string $itemType (i.e 'Pages' or 'Files')
      * @param array  $columns  Columns
      */
-    public function updateColumns($itemType, &$columns)
+    protected function updateColumns($itemType, &$columns)
     {
         if ($itemType !== 'Pages') {
             return;