diff --git a/Resources/config/services.yml b/Resources/config/services.yml
index 788727b..be04ac5 100644
--- a/Resources/config/services.yml
+++ b/Resources/config/services.yml
@@ -4,6 +4,6 @@ parameters:
 services:
     omnipay:
         class: %omnipay.service.class%
-        arguments: [ @service_container, @logger ]
+        arguments: [ "@service_container", "@logger" ]
         tags:
               - { name: monolog.logger, channel: omnipay }