diff --git a/config/anonaddy.php b/config/anonaddy.php
index 358e71b..3c71b45 100644
--- a/config/anonaddy.php
+++ b/config/anonaddy.php
@@ -167,7 +167,7 @@ return [
     |
     */
 
-    'dkim_signing_key' => ! is_null(env('ANONADDY_DKIM_SIGNING_KEY')) ? file_get_contents(env('ANONADDY_DKIM_SIGNING_KEY')) : null,
+    'dkim_signing_key' => env('ANONADDY_DKIM_SIGNING_KEY') ? file_get_contents(env('ANONADDY_DKIM_SIGNING_KEY')) : null,
 
     /*
     |--------------------------------------------------------------------------