diff --git a/docker-compose.yml b/docker-compose.yml
index ab89374d0d..bb13de6310 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -65,7 +65,7 @@ services:
       AUTHENTIK_ISSUER: ${AUTHENTIK_ISSUER}
       AUTHENTIK_CLIENT_ID: ${AUTHENTIK_CLIENT_ID}
       AUTHENTIK_CLIENT_SECRET: ${AUTHENTIK_CLIENT_SECRET}
-      ALLOWED_HOSTNAMES: ${ALLOWED_HOSTNAMES}
+      ALLOWED_HOSTNAMES: '"${ALLOWED_HOSTNAMES}"'
       RESERVED_SUBDOMAINS: ${RESERVED_SUBDOMAINS:-"app","auth","docs","design","console","go","status","api","saml","www","matrix","developer","cal","my","team","support","security","blog","learn","admin"}
       CALCOM_TELEMETRY_DISABLED: ${CALCOM_TELEMETRY_DISABLED:-1}
       CRON_API_KEY: ${CRON_API_KEY}
diff --git a/portainer.env.example b/portainer.env.example
index 64f4c56e26..50038d2fc0 100644
--- a/portainer.env.example
+++ b/portainer.env.example
@@ -1,7 +1,7 @@
 # Required public URL settings
 NEXT_PUBLIC_WEBAPP_URL=https://cal.example.com
 NEXTAUTH_URL=https://cal.example.com/api/auth
-ALLOWED_HOSTNAMES="cal.example.com"
+ALLOWED_HOSTNAMES=cal.example.com
 
 # Required secrets
 POSTGRES_PASSWORD=replace-with-a-long-random-password