diff --git a/README.md b/README.md
index fd0110b..a7218a1 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ dokku mongo:link lolipop playground
 
 # the above will expose the following environment variables
 #
-#   MONGO_URL=mongo://172.17.0.1:27017
+#   MONGO_URL=mongo://172.17.0.1:27017/lolipop
 #   MONGO_NAME=/lolipop/DATABASE
 #   MONGO_PORT=tcp://172.17.0.1:27017
 #   MONGO_PORT_27017_TCP=tcp://172.17.0.1:27017