diff --git a/manuscript/ha-docker-swarm/traefik.md b/manuscript/ha-docker-swarm/traefik.md
index bd2feae..35d1cf9 100644
--- a/manuscript/ha-docker-swarm/traefik.md
+++ b/manuscript/ha-docker-swarm/traefik.md
@@ -79,7 +79,7 @@ swarmmode = true
 Create /var/data/traefik/docker-compose.yml as follows:
 
 ```
-version: "3.2"
+version: "3"
 
 services:
   traefik: