laravel-medialibrary: php artisan migrate error

Hi, Using L5.4, I’m trying to install the package but I can’t migrate the table, an error says :

[Illuminate\Database\QueryException]
SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check th
e manual that corresponds to your MariaDB server version for the right syntax to use near ‘json not nu
ll, custom_properties json not null, order_column int unsigned nu’ at line 1 (SQL: create table m edia (id int unsigned not null auto_increment primary key, model_id int unsigned not null, model _type varchar(191) not null, collection_name varchar(191) not null, name varchar(191) not null, file_name varchar(191) not null, mime_type varchar(191) null, disk varchar(191) not null, size
int unsigned not null, manipulations json not null, custom_properties json not null, order_column int unsigned null, created_at timestamp null, updated_at timestamp null) default character set u
tf8mb4 collate utf8mb4_unicode_ci)

[PDOException]
SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check th
e manual that corresponds to your MariaDB server version for the right syntax to use near ‘json not nu
ll, custom_properties json not null, order_column int unsigned nu’ at line 1

Please where’s the mistake ?