diff --git a/seafile-server-ce-ubuntu-14-04-amd64-http b/seafile-server-ce-ubuntu-14-04-amd64-http
index e96441e..f113e79 100644
--- a/seafile-server-ce-ubuntu-14-04-amd64-http
+++ b/seafile-server-ce-ubuntu-14-04-amd64-http
@@ -265,7 +265,12 @@ update-rc.d seafile-server defaults
 adduser --system --gecos "${SEAFILE_USER}" ${SEAFILE_USER} --home /opt/seafile
 mkdir -p /opt/seafile/installed
 cd /opt/seafile/
-curl -OL ${SEAFILE_SERVER_PACKAGE_URL}
+if [ ! -e /opt/${SEAFILE_SERVER_PACKAGE} ];
+then
+    curl -OL ${SEAFILE_SERVER_PACKAGE_URL}
+else
+    cp /opt/${SEAFILE_SERVER_PACKAGE} .
+fi
 tar xzf ${SEAFILE_SERVER_PACKAGE}
 
 mv ${SEAFILE_SERVER_PACKAGE} installed