diff --git a/__swarm/bookstack/bookstack-swarm.yml b/__swarm/bookstack/bookstack-swarm.yml
index 0b74f7a..a80c27a 100644
--- a/__swarm/bookstack/bookstack-swarm.yml
+++ b/__swarm/bookstack/bookstack-swarm.yml
@@ -49,4 +49,3 @@ services:
       placement:
         constraints:
         - node.role == manager
-version: '2'