diff --git a/docker-compose.yml b/docker-compose.yml
index 1877e2c9..1f1901da 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,5 +3,4 @@ services:
   mongo:
     image: ${MONGODB_IMAGE:-percona/percona-server-mongodb:3.4}
     ports:
-      - 27017
-
+      - "27017:27017"