diff --git a/mongo/Dockerfile b/mongo/Dockerfile
index 5dece87..852d9b0 100644
--- a/mongo/Dockerfile
+++ b/mongo/Dockerfile
@@ -2,4 +2,4 @@ FROM ubuntu:14.04
 RUN apt-get update -y && apt-get install -y wget
 RUN cd /opt && wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.6.5.tgz
 RUN cd /opt && tar -xvzf mongodb-linux-x86_64-2.6.5.tgz
-RUN cp mongo.conf /opt/mongodb-linux-x86_64-2.6.5/mongo.conf
+ADD mongo.conf /opt/mongodb-linux-x86_64-2.6.5/mongo.conf