diff --git a/slides/swarm/firstservice.md b/slides/swarm/firstservice.md
index d7b01583..1e9ad5b7 100644
--- a/slides/swarm/firstservice.md
+++ b/slides/swarm/firstservice.md
@@ -237,7 +237,7 @@ The latest version of the ElasticSearch image won't start without mandatory conf
 
 ---
 
-class: extra-details
+class: extra-details, pic
 
 ![diagram showing what happens during docker service create, courtesy of @aluzzardi](images/docker-service-create.svg)