diff --git a/backend/src/DataSource/MqttSource.ts b/backend/src/DataSource/MqttSource.ts
index 3a7a4cb4..91c77cad 100644
--- a/backend/src/DataSource/MqttSource.ts
+++ b/backend/src/DataSource/MqttSource.ts
@@ -44,8 +44,9 @@ export class MqttSource implements DataSource<MqttOptions> {
       username: options.username,
       password: options.password,
       clientId: options.clientId,
+      servername: options.tls ? url.host : undefined,
       ca: options.certificateAuthority ? Buffer.from(options.certificateAuthority, 'base64') : undefined,
-    })
+    } as any)
 
     this.client = client