diff --git a/omr-admin.py b/omr-admin.py
index 7cd36b6..ea8b40f 100644
--- a/omr-admin.py
+++ b/omr-admin.py
@@ -235,9 +235,9 @@ def shadowsocks():
     if port is None or method is None or fast_open is None or reuse_port is None or no_delay is None or key is None:
         return jsonify({'result': 'error','reason': 'Invalid parameters','route': 'shadowsocks'})
     if obfs:
-        shadowsocks_config = {'server': ('[::0]', '0.0.0.0'),'server_port': port,'local_port': 1081,'mode': 'tcp_and_udp','key': key,'timeout': timeout,'method': method,'verbose': verbose,'prefer_ipv6': prefer_ipv6,'fast_open': fast_open,'no_delay': no_delay,'reuse_port': reuse_port,'mptcp': mptcp,'ebpf': ebpf,'plugin': '/usr/local/bin/obfs-server','plugin_opts': 'obfs=http;mptcp;fast-open;t=400'}
+        shadowsocks_config = {'server': ('[::0]', '0.0.0.0'),'server_port': port,'local_port': 1081,'mode': 'tcp_and_udp','key': key,'timeout': timeout,'method': method,'verbose': verbose,'ipv6_first': True, 'prefer_ipv6': prefer_ipv6,'fast_open': fast_open,'no_delay': no_delay,'reuse_port': reuse_port,'mptcp': mptcp,'ebpf': ebpf,'plugin': '/usr/local/bin/obfs-server','plugin_opts': 'obfs=http;mptcp;fast-open;t=400'}
     else:
-        shadowsocks_config = {'server': ('[::0]', '0.0.0.0'),'server_port': port,'local_port': 1081,'mode': 'tcp_and_udp','key': key,'timeout': timeout,'method': method,'verbose': verbose,'prefer_ipv6': prefer_ipv6,'fast_open': fast_open,'no_delay': no_delay,'reuse_port': reuse_port,'mptcp': mptcp,'ebpf': ebpf}
+        shadowsocks_config = {'server': ('[::0]', '0.0.0.0'),'server_port': port,'local_port': 1081,'mode': 'tcp_and_udp','key': key,'timeout': timeout,'method': method,'verbose': verbose,'ipv6_first': True, 'prefer_ipv6': prefer_ipv6,'fast_open': fast_open,'no_delay': no_delay,'reuse_port': reuse_port,'mptcp': mptcp,'ebpf': ebpf}
 
     if ordered(data) != ordered(json.loads(json.dumps(shadowsocks_config))):
         with open('/etc/shadowsocks-libev/config.json','w') as outfile: