diff --git a/src/Models/AccessToken.php b/src/Models/AccessToken.php
index 502d559..4204e88 100644
--- a/src/Models/AccessToken.php
+++ b/src/Models/AccessToken.php
@@ -15,4 +15,5 @@ use Flarum\Database\AbstractModel;
 class AccessToken extends AbstractModel
 {
     protected $table = 'oauth_access_tokens';
+    protected $guarded = [];
 }
diff --git a/src/Models/AuthorizationCode.php b/src/Models/AuthorizationCode.php
index 8b34f73..f144175 100644
--- a/src/Models/AuthorizationCode.php
+++ b/src/Models/AuthorizationCode.php
@@ -15,4 +15,5 @@ use Flarum\Database\AbstractModel;
 class AuthorizationCode extends AbstractModel
 {
     protected $table = 'oauth_authorization_codes';
+    protected $guarded = [];
 }
diff --git a/src/Models/Client.php b/src/Models/Client.php
index c9e2c98..d6dc3d2 100644
--- a/src/Models/Client.php
+++ b/src/Models/Client.php
@@ -15,7 +15,6 @@ use Flarum\Database\AbstractModel;
 class Client extends AbstractModel
 {
     protected $table = 'oauth_clients';
-
     protected $guarded = [];
 
     public static function build(string $client_id, string $client_secret, int $user_id)
diff --git a/src/Models/Jwt.php b/src/Models/Jwt.php
index d9ee703..652a3c4 100644
--- a/src/Models/Jwt.php
+++ b/src/Models/Jwt.php
@@ -15,4 +15,5 @@ use Flarum\Database\AbstractModel;
 class Jwt extends AbstractModel
 {
     protected $table = 'oauth_jwt';
+    protected $guarded = [];
 }
diff --git a/src/Models/RefreshToken.php b/src/Models/RefreshToken.php
index 7f6bea0..92919f4 100644
--- a/src/Models/RefreshToken.php
+++ b/src/Models/RefreshToken.php
@@ -15,4 +15,5 @@ use Flarum\Database\AbstractModel;
 class RefreshToken extends AbstractModel
 {
     protected $table = 'oauth_refresh_tokens';
+    protected $guarded = [];
 }
diff --git a/src/Models/Scope.php b/src/Models/Scope.php
index 125bf94..b191afc 100644
--- a/src/Models/Scope.php
+++ b/src/Models/Scope.php
@@ -15,7 +15,7 @@ use Flarum\Database\AbstractModel;
 class Scope extends AbstractModel
 {
     protected $table = 'oauth_scopes';
-
+    protected $guarded = [];
     static public function get_path_scope($path = '')
     {
         return self::where('resource_path', 'like', $path . '%')->first();