diff --git a/graylog.yaml b/graylog.yaml
index 4b85b0c..eec031b 100644
--- a/graylog.yaml
+++ b/graylog.yaml
@@ -53,8 +53,8 @@ services:
     hostname: "server"
     image: "${GRAYLOG_IMAGE:-graylog/graylog:6.0}"
     depends_on:
-      mongodb:
-        condition: "service_started"
+      - mongodb
+          -condition: "service_started"
     entrypoint: "/usr/bin/tini --  /docker-entrypoint.sh"
     environment:
       GRAYLOG_NODE_ID_FILE: "/usr/share/graylog/data/data/node-id"