diff --git a/src/Chart.php b/src/Chart.php
index e9964f9..5e05588 100644
--- a/src/Chart.php
+++ b/src/Chart.php
@@ -46,7 +46,7 @@ class Chart extends View
     protected $datasets;
 
     /** @var ColorGenerator */
-    public $colorGenerator;
+    protected $colorGenerator;
 
     protected function init(): void
     {
diff --git a/src/ColorGenerator.php b/src/ColorGenerator.php
index b8af727..64b1bb4 100644
--- a/src/ColorGenerator.php
+++ b/src/ColorGenerator.php
@@ -16,7 +16,7 @@ class ColorGenerator
      *
      * @var array<int, array<int, string>>
      */
-    public $colors = [
+    protected $colors = [
         ['rgba(255, 99, 132, 0.2)', 'rgba(255, 99, 132, 1)'],
         ['rgba(54, 162, 235, 0.2)', 'rgba(54, 162, 235, 1)'],
         ['rgba(255, 206, 86, 0.2)', 'rgba(255, 206, 86, 1)'],