diff --git a/docker-compose.yml b/docker-compose.yml
index 88c379f..0b44d42 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -46,6 +46,8 @@ services:
     - ./configs/ot-sim/node-red.json:/etc/node-red.json
     ports:
     - 1880:1880
+    environment:
+    - OTSIM_TAILSCALE_AUTHKEY=${OTSIM_TAILSCALE_AUTHKEY}
     networks:
       vpc:
         ipv4_address: 10.11.12.100