diff --git a/build.sh b/build.sh
index f133588..1ccc462 100755
--- a/build.sh
+++ b/build.sh
@@ -37,7 +37,7 @@ retry() {
   # max retry 5 times
   try=5
   # sleep 3s every retry
-  sleep_time=3
+  sleep_time=30
   for i in $(seq ${try}); do
     echo "executing with retry: $@" >&2
     if eval "$@"; then