diff --git a/update.sh b/update.sh
index e93253aa4cb80742cebf38408ecdf7ec0f2388ed..75c960a20053ed8a61c193e3f50fe895cf37c14d 100755
--- a/update.sh
+++ b/update.sh
@@ -4,6 +4,8 @@ target="${1:-master}"
 
 echo "reset target is $target"
 
+GIT_TERMINAL_PROMPT=0
+
 # update meta repo
 git fetch origin "$target"
 # use the latest commit on master, discard any local changes