diff --git a/__swarm/bookstack/bookstack-swarm.yml b/__swarm/bookstack/bookstack-swarm.yml
index f5b49d9..5ad5cf9 100644
--- a/__swarm/bookstack/bookstack-swarm.yml
+++ b/__swarm/bookstack/bookstack-swarm.yml
@@ -44,4 +44,3 @@ services:
       placement:
         constraints:
         - node.role == manager
-version: '2'