diff --git a/scripts/upgrade.py b/scripts/upgrade.py
index 2d12d4d..fb5770a 100755
--- a/scripts/upgrade.py
+++ b/scripts/upgrade.py
@@ -8,10 +8,7 @@ version_re = "seafile-server-?_?([\d\.]*)"
 seaf_home = os.environ["SEAF"] or "/opt/seafile"
 
 def available(page):
-   (arch, _) = platform.architecture()
-   if arch == "64bit":
-      arch = "x86-64"
-   else: arch = "i386"
+   arch = platform.machine()
    link = "http(s?):\/\/[^ \"\(\)\<\>]*%s_?%s.tar.gz" % (version_re ,arch)
    resp = requests.get(page)
    available = {}
@@ -99,6 +96,8 @@ def download(url, version):
       return 0
 
 def install_command(url, version):
+   if platform.machine() == "armv7l":
+      url = "https://github.com/haiwen/seafile-rpi/releases/download/v%s/seafile-server_%s_stable_pi.tar.gz" % (version,version)
    pkg = download(url, version)
    tmp = tempfile.mkdtemp()
    if pkg and call(["/bin/sh", "-c", 'cd %s; tar xzvf %s' % (tmp, pkg)]) == 0: