diff --git a/framework/helpers/BaseHtml.php b/framework/helpers/BaseHtml.php
index 009019921d3..52c86d24dc4 100644
--- a/framework/helpers/BaseHtml.php
+++ b/framework/helpers/BaseHtml.php
@@ -2316,6 +2316,12 @@ public static function getAttributeValue($model, $attribute)
             $value = $value->getPrimaryKey(false);
 
             return is_array($value) ? json_encode($value) : $value;
+        } elseif (version_compare(PHP_VERSION, '8.1.0') >= 0) {
+            if ($value instanceof \BackedEnum) {
+                $value = $value->value;
+            } elseif ($value instanceof \UnitEnum) {
+                $value = $value->name;
+            }
         }
 
         return $value;
diff --git a/framework/validators/RangeValidator.php b/framework/validators/RangeValidator.php
index 1c1c7bc0102..5b613ffd4e9 100644
--- a/framework/validators/RangeValidator.php
+++ b/framework/validators/RangeValidator.php
@@ -124,6 +124,13 @@ public function getClientOptions($model, $attribute)
     {
         $range = [];
         foreach ($this->range as $value) {
+            if (version_compare(PHP_VERSION, '8.1.0') >= 0) {
+                if ($value instanceof \BackedEnum) {
+                    $value = $value->value;
+                } elseif ($value instanceof \UnitEnum) {
+                    $value = $value->name;
+                }
+            }            
             $range[] = (string) $value;
         }
         $options = [