diff --git a/scripts/upgrade.py b/scripts/upgrade.py
index 043a528..492d440 100755
--- a/scripts/upgrade.py
+++ b/scripts/upgrade.py
@@ -81,7 +81,10 @@ def perform_upgrade_command(version,mysql=False,yes=True):
 def download(url, version):
    tmp = tempfile.mkdtemp()
    filename = "server_%s.tar.gz" % version
-   dest = os.path.join(seaf_home, "pkg", filename)
+   pks = os.path.join(seaf_home, "pkg")
+   if not os.path.exists(pks):
+      os.mkdir(pks)
+   dest = os.path.join(pks, filename)
    if os.path.exists(dest):
       return dest
    if call(["/bin/sh", "-c", 'curl %s --output %s/%s' % (url, tmp, filename)]) == 0: