diff --git a/HOWTO.md b/HOWTO.md
index 6a342e11..b67eeb1e 100644
--- a/HOWTO.md
+++ b/HOWTO.md
@@ -499,6 +499,7 @@ Key settings in `cameleer-server-app/src/main/resources/application.yml`. All cu
 | `cameleer.server.runtime.routingmode` | `path` | `CAMELEER_SERVER_RUNTIME_ROUTINGMODE` | `path` or `subdomain` Traefik routing |
 | `cameleer.server.runtime.routingdomain` | `localhost` | `CAMELEER_SERVER_RUNTIME_ROUTINGDOMAIN` | Domain for Traefik routing labels |
 | `cameleer.server.runtime.serverurl` | *(empty)* | `CAMELEER_SERVER_RUNTIME_SERVERURL` | Server URL injected into app containers |
+| `cameleer.server.runtime.certresolver` | *(empty)* | `CAMELEER_SERVER_RUNTIME_CERTRESOLVER` | Traefik TLS cert resolver name (e.g. `letsencrypt`). Blank = omit the `tls.certresolver` label and let Traefik serve the default TLS-store cert |
 | `cameleer.server.runtime.agenthealthport` | `9464` | `CAMELEER_SERVER_RUNTIME_AGENTHEALTHPORT` | Agent health check port |
 | `cameleer.server.runtime.healthchecktimeout` | `60` | `CAMELEER_SERVER_RUNTIME_HEALTHCHECKTIMEOUT` | Health check timeout (seconds) |
 | `cameleer.server.runtime.container.memorylimit` | `512m` | `CAMELEER_SERVER_RUNTIME_CONTAINER_MEMORYLIMIT` | Default memory limit for app containers |