diff --git a/Resources/config/orm-services.yml b/Resources/config/orm-services.yml
index 427db034..a46943ce 100644
--- a/Resources/config/orm-services.yml
+++ b/Resources/config/orm-services.yml
@@ -1,7 +1,7 @@
 services:
     ambta_doctrine_encrypt.orm_subscriber:
         class: Ambta\DoctrineEncryptBundle\Subscribers\DoctrineEncryptSubscriber
-        arguments: ["@annotation_reader", %ambta_doctrine_encrypt.encryptor_class_name%, %ambta_doctrine_encrypt.secret_key%]
+        arguments: ["@annotation_reader", "%ambta_doctrine_encrypt.encryptor_class_name%", "%ambta_doctrine_encrypt.secret_key%"]
         tags:
             -  { name: doctrine.event_subscriber }
     ambta_doctrine_encrypt.subscriber:
@@ -9,5 +9,5 @@ services:
     ambta_doctrine_encrypt.encryptor:
         class: Ambta\DoctrineEncryptBundle\Services\Encryptor
         arguments:
-            - %ambta_doctrine_encrypt.encryptor_class_name%
-            - %ambta_doctrine_encrypt.secret_key%
\ No newline at end of file
+            - "%ambta_doctrine_encrypt.encryptor_class_name%"
+            - "%ambta_doctrine_encrypt.secret_key%"