diff --git a/README.txt b/README.txt
index 6d87810..98032d2 100644
--- a/README.txt
+++ b/README.txt
@@ -164,13 +164,12 @@ Memcache locks can be enabled through the services.yml file.
     # Replaces the default lock backend with a memcache implementation.
     lock:
       class: Drupal\Core\Lock\LockBackendInterface
-      factory: ['@memcache.lock.factory', get]
+      factory: memcache.lock.factory:get
 
     # Replaces the default persistent lock backend with a memcache implementation.
     lock.persistent:
       class: Drupal\Core\Lock\LockBackendInterface
-      factory: ['@memcache.lock.factory', get]
-      arguments: [true]
+      factory: memcache.lock.factory:getPersistent
 
 ## TROUBLESHOOTING ##