diff --git a/build.gradle b/build.gradle
index fa2e9e10..7434db6d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,6 @@ allprojects {
     repositories {
         mavenLocal()
         mavenCentral()
-        jcenter()
     }
 }
 
@@ -19,7 +18,8 @@ subprojects {
     apply plugin: 'java-library'
 
     dependencies {
-        implementation 'se.koc:zutil:1.0.291'
+        implementation 'se.koc:zutil:1.0.297'
+        //implementation 'se.koc:zutil:1.0.0-SNAPSHOT'
 
         testImplementation 'junit:junit:4.12'
         testImplementation 'org.hamcrest:hamcrest-core:2.2'
diff --git a/hal.conf.example b/hal.conf.example
index 6eff45dc..c4341332 100644
--- a/hal.conf.example
+++ b/hal.conf.example
@@ -3,6 +3,12 @@
 # ------------------------------------
 
 hal_core.http_port=8080
+
+# External HTTP server requires SSL certificate which is provided by letsencrypt, for the authentication
+# to letsencrypt to work port 80 needs to be opened temporarily during the certificate generation process
+# make sure the firewall forwarding rules are setup for this process to work.
+# In the future DNS authentication will also be available so no port forwarding will be necessary.
+hal_core.http_acme_type=http|dns
 hal_core.http_external_port=8081
 #hal_core.http_external_domain=example.com