diff --git a/src/Interfaces/CurrentRequestServiceInterface.php b/src/Interfaces/CurrentRequestServiceInterface.php
index ea31f30..9114802 100644
--- a/src/Interfaces/CurrentRequestServiceInterface.php
+++ b/src/Interfaces/CurrentRequestServiceInterface.php
@@ -1,4 +1,4 @@
-<?php 
+<?php
 
 declare(strict_types=1);
 
diff --git a/src/Laravel/LaravelCurrentRequestService.php b/src/Laravel/LaravelCurrentRequestService.php
index 8e4920f..49f11f3 100644
--- a/src/Laravel/LaravelCurrentRequestService.php
+++ b/src/Laravel/LaravelCurrentRequestService.php
@@ -1,4 +1,4 @@
-<?php 
+<?php
 
 declare(strict_types=1);
 
diff --git a/src/Laravel/PassportServiceProvider.php b/src/Laravel/PassportServiceProvider.php
index 6f2e7b8..fc907f0 100644
--- a/src/Laravel/PassportServiceProvider.php
+++ b/src/Laravel/PassportServiceProvider.php
@@ -57,7 +57,7 @@ public function makeAuthorizationServer(): AuthorizationServer
             app(ClaimExtractor::class),
             Configuration::forSymmetricSigner(
                 app(config('openid.signer')),
-                InMemory::file($cryptKey->getKeyPath()),
+                InMemory::plainText($cryptKey->getKeyContents()),
             ),
             app(LaravelCurrentRequestService::class),
             $encryptionKey,
diff --git a/src/Services/CurrentRequestService.php b/src/Services/CurrentRequestService.php
index 73a7b4d..2c5280f 100644
--- a/src/Services/CurrentRequestService.php
+++ b/src/Services/CurrentRequestService.php
@@ -1,4 +1,4 @@
-<?php 
+<?php
 
 declare(strict_types=1);