diff --git a/s/preview b/s/preview
index 049eaac50..eab88c921 100755
--- a/s/preview
+++ b/s/preview
@@ -22,7 +22,7 @@ exit $2 # otherwise
 function build() {
 assert_dir $SOURCE
 cd $SOURCE
-[ -z $1 ] || git checkout $1
+[ -z $1 ] || ( git checkout $1 && git submodule update )
 git pull || abort "failed to update source. do you have local changes?"
 s/build || abort "build failed."
 }
diff --git a/storage b/storage
index 5f0b7095d..746d96d40 160000
--- a/storage
+++ b/storage
@@ -1 +1 @@
-Subproject commit 5f0b7095d42209762c9eac73c866c614018b440d
+Subproject commit 746d96d405ddebcf6c882d5b198fd96df82abe11