diff --git a/docker-compose.yml b/docker-compose.yml
index 79ea0ca..c352466 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -25,6 +25,7 @@ services:
       - "traefik.http.routers.centurion.rule=Host(`centurion.harambee.utwente.nl`)"
       - "traefik.http.routers.centurion.tls=true"
       - "traefik.http.routers.centurion.tls.options=default"
+      - "traefik.http.routers.centurion.tls.certresolver=letsencrypt"
 
 networks:
   web: