diff --git a/src/CryptKey.php b/src/CryptKey.php
index 151b57fc..b3136077 100644
--- a/src/CryptKey.php
+++ b/src/CryptKey.php
@@ -50,7 +50,7 @@ class CryptKey
             $keyPathPerms = decoct(fileperms($keyPath) & 0777);
             if (in_array($keyPathPerms, ['400', '440', '600', '660'], true) === false) {
                 trigger_error(sprintf(
-                    'Key file "%s" permissions are not correct, should be 600 or 660 instead of %s',
+                    'Key file "%s" permissions are not correct, recommend changing to 600 or 660 instead of %s',
                     $keyPath,
                     $keyPathPerms
                 ), E_USER_NOTICE);