diff --git a/ubuntu-14.04/http/preseed-lvm.cfg b/ubuntu-14.04/http/preseed-lvm.cfg
index 4690b8e..0b12180 100644
--- a/ubuntu-14.04/http/preseed-lvm.cfg
+++ b/ubuntu-14.04/http/preseed-lvm.cfg
@@ -28,7 +28,7 @@
 
 d-i partman-auto/expert_recipe string                         \
       boot-root ::                                            \
-              64 128 128 ext4                                 \
+              64 128 256 ext4                                 \
                       $primary{ } $bootable{ }                \
                       method{ format } format{ }              \
                       use_filesystem{ } filesystem{ ext4 }    \