diff --git a/ubuntu-14.04/http/preseed.cfg b/ubuntu-14.04/http/preseed.cfg
index 06c2ddd..adb5924 100644
--- a/ubuntu-14.04/http/preseed.cfg
+++ b/ubuntu-14.04/http/preseed.cfg
@@ -1,4 +1,7 @@
-choose-mirror-bin mirror/http/proxy string
+d-i apt-setup/use_mirror boolean false
+d-i apt-setup/local0/repository string [arch=amd64] http://apt.cloudlab.cz/nightly trusty main cloudlab security
+d-i apt-setup/local0/key string http://apt.cloudlab.cz/public.gpg
+
 d-i debian-installer/framebuffer boolean false
 d-i debconf/frontend select noninteractive
 d-i base-installer/kernel/override-image string linux-server