diff --git a/README.md b/README.md
index babefaf..07b790a 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,11 @@ On MacOS, you can setup a Launch Agent in `~/Library/LaunchAgents/com.mrgeckosme
     <false/>
 </dict>
 </plist>
+```
 
+For local network connection, you need to code sign your build.
+```bash
+codesign -s - --force --deep /path/to/bin/midi-request-trigger
 ```
 
 Start with:
diff --git a/midiRouter.go b/midiRouter.go
index 58d41e3..9cdcb25 100644
--- a/midiRouter.go
+++ b/midiRouter.go
@@ -613,5 +613,7 @@ func (r *MidiRouter) Disconnect() {
 	if r.ListenerStop != nil {
 		r.ListenerStop()
 	}
-	r.MqttClient.Disconnect(0)
+	if r.MqttClient != nil {
+		r.MqttClient.Disconnect(0)
+	}
 }