diff --git a/Dockerfile b/Dockerfile
index b93b300..e1335e1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,12 @@
 FROM ubuntu:trusty
 
-RUN apt-get -qq update && \
-    apt-get -qq install -y git-core subversion build-essential gcc-multilib ccache quilt \
+RUN DEBIAN_FRONTEND=noninteractive apt-get -qq update && \
+    DEBIAN_FRONTEND=noninteractive apt-get -qq install -y git-core subversion build-essential gcc-multilib ccache quilt \
                        libncurses5-dev zlib1g-dev gawk flex gettext wget unzip python vim libssl-dev && \
     apt-get clean && \
     useradd -m openwrt && \
     echo 'openwrt ALL=NOPASSWD: ALL' > /etc/sudoers.d/openwrt
 RUN sudo -iu openwrt git clone git://git.openwrt.org/14.07/openwrt.git
-RUN sudo -iu openwrt openwrt/scripts/feeds update && && sudo -iu openwrt rm -rf tmp
+RUN sudo -iu openwrt openwrt/scripts/feeds update && sudo -iu openwrt rm -rf tmp
 USER openwrt
 WORKDIR /home/openwrt/openwrt