diff --git a/playbooks/templates/chaosknoten/configs/hackertours/compose.yaml.j2 b/playbooks/templates/chaosknoten/configs/hackertours/compose.yaml.j2
index 2673346..4dad604 100644
--- a/playbooks/templates/chaosknoten/configs/hackertours/compose.yaml.j2
+++ b/playbooks/templates/chaosknoten/configs/hackertours/compose.yaml.j2
@@ -33,7 +33,7 @@ services:
       - "8345:80"
     environment:
       - "PRETIX_INSTANCE_NAME=CCCHH Hackertours"
-      - "PRETIX_URL=http://hackertours.hamburg.ccc.de"
+      - "PRETIX_URL=https://hackertours.hamburg.ccc.de"
       - "DATABASE_BACKEND=postgresql"
       - "DATABASE_NAME=pretix"
       - "DATABASE_USER=pretix"