diff --git a/src/Grant/ClientCredentialsGrant.php b/src/Grant/ClientCredentialsGrant.php
index 5b80d02f..3c1db5e0 100644
--- a/src/Grant/ClientCredentialsGrant.php
+++ b/src/Grant/ClientCredentialsGrant.php
@@ -32,7 +32,7 @@ class ClientCredentialsGrant extends AbstractGrant
 
         // Finalize the requested scopes
         $scopes = $this->scopeRepository->finalizeScopes($scopes, $client);
-        
+
         // Issue and persist access token
         $accessToken = $this->issueAccessToken($accessTokenTTL, $client, $client->getIdentifier(), $scopes);
 
diff --git a/src/Grant/PasswordGrant.php b/src/Grant/PasswordGrant.php
index 1d2af5e6..40bf39d5 100644
--- a/src/Grant/PasswordGrant.php
+++ b/src/Grant/PasswordGrant.php
@@ -11,7 +11,6 @@
 namespace League\OAuth2\Server\Grant;
 
 use League\OAuth2\Server\Entities\Interfaces\ClientEntityInterface;
-use League\OAuth2\Server\Entities\Interfaces\ScopeEntityInterface;
 use League\OAuth2\Server\Entities\Interfaces\UserEntityInterface;
 use League\OAuth2\Server\Exception\OAuthServerException;
 use League\OAuth2\Server\Repositories\RefreshTokenRepositoryInterface;
diff --git a/src/Repositories/ScopeRepositoryInterface.php b/src/Repositories/ScopeRepositoryInterface.php
index 1f933426..95230bb6 100644
--- a/src/Repositories/ScopeRepositoryInterface.php
+++ b/src/Repositories/ScopeRepositoryInterface.php
@@ -39,5 +39,5 @@ interface ScopeRepositoryInterface extends RepositoryInterface
      *
      * @return \League\OAuth2\Server\Entities\Interfaces\ScopeEntityInterface[]
      */
-    public function finalizeScopes(array $scopes = [], ClientEntityInterface $clientEntity, $userIdentifier = null);
+    public function finalizeScopes(array $scopes, ClientEntityInterface $clientEntity, $userIdentifier = null);
 }