diff --git a/tasks/haproxy_networks.yml b/tasks/haproxy_networks.yml
index 7f30c73..6486bb8 100644
--- a/tasks/haproxy_networks.yml
+++ b/tasks/haproxy_networks.yml
@@ -12,7 +12,7 @@
     docker_compose:
       project_name: haproxy_haproxy
       definition:
-        version: 3
+        version: '3'
         services:
           haproxy_haproxy:
             networks: '{{ docker_swarm_haproxy_networks }}'
@@ -22,7 +22,7 @@
     docker_compose:
       project_name: haproxy_haproxy
       definition:
-        version: 3
+        version: '3'
         services:
           haproxy_haproxy:
             networks: '{{ docker_swarm_haproxy_additional_networks }}'