diff --git a/composer.json b/composer.json
index 47dfc77..a134e24 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
         }
     },
     "require": {
-        "laravel/framework": "~6.0|~7.0|~8.0",
+        "laravel/framework": "~6.0|~7.0|~8.0|~9.0",
         "optimus/architect": "~2.0"
     },
     "require-dev": {
diff --git a/src/EloquentBuilderTrait.php b/src/EloquentBuilderTrait.php
index 4bc5a6f..195a3fd 100644
--- a/src/EloquentBuilderTrait.php
+++ b/src/EloquentBuilderTrait.php
@@ -105,7 +105,7 @@ protected function applyFilterGroups($queryBuilder, array $filterGroups = [], ar
      * @param bool|false $or
      * @param array $joins
      */
-    protected function applyFilter($queryBuilder, array $filter, $or = false, array &$joins)
+    protected function applyFilter($queryBuilder, array $filter, $or, array &$joins)
     {
         // Destructure Shorthand Filtering Syntax if filter is Shorthand
         if (! array_key_exists('key', $filter) && count($filter) >= 3) {
diff --git a/src/LaravelController.php b/src/LaravelController.php
index 8b355b2..e4cab1c 100644
--- a/src/LaravelController.php
+++ b/src/LaravelController.php
@@ -125,9 +125,9 @@ protected function parseFilterGroups(array $filter_groups)
             $or = false;
             if (array_key_exists('or', $group)) {
                 if ($group['or'] === 'true') {
-                    $group['or'] = true;
+                    $or = true;
                 } else if ($group['or'] === 'false') {
-                    $group['or'] = false;
+                    $or = false;
                 }
             }