diff --git a/docker.go b/docker.go
index 723e4cf..aea6366 100644
--- a/docker.go
+++ b/docker.go
@@ -71,8 +71,8 @@ func dockerRunMongo() {
 				},
 			},
 			Binds: []string{
-				fmt.Sprintf("%s/mongo%d:/data/db", mongoBasePath, containerNumber),
-				fmt.Sprintf("%s:/opt/keyfile", mongoBasePath),
+				fmt.Sprintf("%s/mongo%d:/data/db:z", mongoBasePath, containerNumber),
+				fmt.Sprintf("%s:/opt/keyfile:z", mongoBasePath),
 			},
 			NetworkMode: container.NetworkMode(networkName),
 			RestartPolicy: container.RestartPolicy{