diff --git a/src/Interfaces/StorageDriver.php b/src/Interfaces/StorageDriver.php
index 56c1af4d..e4640ba1 100644
--- a/src/Interfaces/StorageDriver.php
+++ b/src/Interfaces/StorageDriver.php
@@ -6,7 +6,7 @@ interface StorageDriver
 {
     public function identifyTenant(string $domain): array;
     public function getAllTenants(array $uuids = []): array;
-    public function getTenantById(string $uuid, $fields = []): array;
+    public function getTenantById(string $uuid, array $fields = []): array;
     public function getTenantIdByDomain(string $domain): ?string;
     public function createTenant(string $domain, string $uuid): array;
     public function deleteTenant(string $uuid): bool;
diff --git a/src/StorageDrivers/RedisStorageDriver.php b/src/StorageDrivers/RedisStorageDriver.php
index b753f75c..58eb1499 100644
--- a/src/StorageDrivers/RedisStorageDriver.php
+++ b/src/StorageDrivers/RedisStorageDriver.php
@@ -27,10 +27,10 @@ class RedisStorageDriver implements StorageDriver
      * Get information about the tenant based on his uuid.
      *
      * @param string $uuid
-     * @param array|string $fields
+     * @param array $fields
      * @return array
      */
-    public function getTenantById(string $uuid, $fields = []): array
+    public function getTenantById(string $uuid, array $fields = []): array
     {
         $fields = (array) $fields;