diff --git a/ShadowsocksX-NG/LaunchAgentUtils.swift b/ShadowsocksX-NG/LaunchAgentUtils.swift
index 39ada61..27a2802 100644
--- a/ShadowsocksX-NG/LaunchAgentUtils.swift
+++ b/ShadowsocksX-NG/LaunchAgentUtils.swift
@@ -8,7 +8,7 @@
 
 import Foundation
 
-let SS_LOCAL_VERSION = "2.5.6.56static"
+let SS_LOCAL_VERSION = "2.5.6.7.static"
 let PRIVOXY_VERSION = "3.0.26.static"
 let APP_SUPPORT_DIR = "/Library/Application Support/ShadowsocksX-NG/"
 let LAUNCH_AGENT_DIR = "/Library/LaunchAgents/"
diff --git a/ShadowsocksX-NG/PreferencesWindowController.swift b/ShadowsocksX-NG/PreferencesWindowController.swift
index f64b12a..481e164 100644
--- a/ShadowsocksX-NG/PreferencesWindowController.swift
+++ b/ShadowsocksX-NG/PreferencesWindowController.swift
@@ -79,6 +79,7 @@ class PreferencesWindowController: NSWindowController
             "auth_sha1_v4",
             "auth_aes128_sha1",
             "auth_aes128_md5",
+            "auth_chain_a",
             ])
         ObfsTextField.addItems(withObjectValues: [
             "plain",
diff --git a/ShadowsocksX-NG/install_ss_local.sh b/ShadowsocksX-NG/install_ss_local.sh
index decc43c..3b98c83 100755
--- a/ShadowsocksX-NG/install_ss_local.sh
+++ b/ShadowsocksX-NG/install_ss_local.sh
@@ -8,7 +8,7 @@
 
 
 cd `dirname "${BASH_SOURCE[0]}"`
-ssLocalVersion=2.5.6.6.static
+ssLocalVersion=2.5.6.7.static
 mkdir -p "$HOME/Library/Application Support/ShadowsocksX-NG/ss-local-$ssLocalVersion"
 cp -f ss-local "$HOME/Library/Application Support/ShadowsocksX-NG/ss-local-$ssLocalVersion/"
 rm -f "$HOME/Library/Application Support/ShadowsocksX-NG/ss-local"
diff --git a/ShadowsocksX-NG/ss-local b/ShadowsocksX-NG/ss-local
index 8d1c7ae..91ca799 100755
Binary files a/ShadowsocksX-NG/ss-local and b/ShadowsocksX-NG/ss-local differ