diff --git a/docker/docker-compose-waii-iotdb.yml b/docker/docker-compose-waii-iotdb.yml
index 6b86735..a87d06e 100644
--- a/docker/docker-compose-waii-iotdb.yml
+++ b/docker/docker-compose-waii-iotdb.yml
@@ -1,4 +1,3 @@
-version: "3"
 name: cdsp-waii-iotdb
 
 services: