diff --git a/build.conf b/build.conf
index 35e56e3a..104ad7ff 100644
--- a/build.conf
+++ b/build.conf
@@ -1,6 +1,6 @@
 IMAGE_NAME=rancher/os
 VERSION=v0.4.1-dev
 
-DOCKER_BINARY_URL=https://github.com/rancher/docker/releases/download/v1.9.0-ros1/docker-1.9.0
+DOCKER_BINARY_URL=https://github.com/rancher/docker/releases/download/v1.9.1-rc1-ros1/docker-1.9.1-rc1
 COMPILED_KERNEL_URL=https://github.com/rancher/os-kernel/releases/download/Ubuntu-4.2.0-16.19/linux-4.2.3-rancher-x86.tar.gz
-DFS_IMAGE=rancher/docker:1.9.0-1
+DFS_IMAGE=rancher/docker:1.9.1-rc1