diff --git a/zigbee2mqtt/README.md b/zigbee2mqtt/README.md
index f875d13..d09225c 100644
--- a/zigbee2mqtt/README.md
+++ b/zigbee2mqtt/README.md
@@ -59,6 +59,7 @@ mqtt:
   #user: '!secret.yaml user'
   #password: '!secret.yaml password'
 serial:
+  adapter: zstack
   port: /dev/ttyACM0
 advanced:
   pan_id: GENERATE
diff --git a/zigbee2mqtt/docker-compose.yml b/zigbee2mqtt/docker-compose.yml
index d0ad2aa..4ae194a 100644
--- a/zigbee2mqtt/docker-compose.yml
+++ b/zigbee2mqtt/docker-compose.yml
@@ -5,7 +5,7 @@
 version: "3.8"
 services:
   zigbee2mqtt:
-    image: koenkk/zigbee2mqtt
+    image: koenkk/zigbee2mqtt:2.1.1
     ports:
       - "8080:8080"
     volumes: