diff --git a/ShadowsocksX-NG/AppDelegate.swift b/ShadowsocksX-NG/AppDelegate.swift
index c354864..51ca5c8 100644
--- a/ShadowsocksX-NG/AppDelegate.swift
+++ b/ShadowsocksX-NG/AppDelegate.swift
@@ -57,6 +57,8 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserNotificationCenterDele
             "ShadowsocksRunningMode": "auto",
             "LocalSocks5.ListenPort": NSNumber(unsignedShort: 1086),
             "LocalSocks5.ListenAddress": "127.0.0.1",
+            "PacServer.ListenAddress": "127.0.0.1",
+            "PacServer.ListenPort":NSNumber(unsignedShort: 8090),
             "LocalSocks5.Timeout": NSNumber(unsignedInteger: 60),
             "LocalSocks5.EnableUDPRelay": NSNumber(bool: false),
             "LocalSocks5.EnableVerboseMode": NSNumber(bool: false),
@@ -91,6 +93,7 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserNotificationCenterDele
             , usingBlock: {
             (note) in
                 SyncSSLocal()
+                self.applyConfig()
             }
         )
         notifyCenter.addObserverForName("NOTIFY_FOUND_SS_URL", object: nil, queue: nil) {
diff --git a/ShadowsocksX-NG/Base.lproj/AdvPreferencesWindowController.xib b/ShadowsocksX-NG/Base.lproj/AdvPreferencesWindowController.xib
index e222c3d..37f475f 100644
--- a/ShadowsocksX-NG/Base.lproj/AdvPreferencesWindowController.xib
+++ b/ShadowsocksX-NG/Base.lproj/AdvPreferencesWindowController.xib
@@ -14,10 +14,10 @@
         <window title="Advance Preferences" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" oneShot="NO" animationBehavior="default" id="F0z-JX-Cv5">
             <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES"/>
             <windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
-            <rect key="contentRect" x="469" y="456" width="480" height="336"/>
+            <rect key="contentRect" x="469" y="456" width="480" height="414"/>
             <rect key="screenRect" x="0.0" y="0.0" width="1440" height="877"/>
             <view key="contentView" id="se5-gp-TjO">
-                <rect key="frame" x="0.0" y="0.0" width="480" height="336"/>
+                <rect key="frame" x="0.0" y="0.0" width="480" height="414"/>
                 <autoresizingMask key="autoresizingMask"/>
                 <subviews>
                     <box verticalHuggingPriority="750" title="Box" boxType="separator" titlePosition="noTitle" translatesAutoresizingMaskIntoConstraints="NO" id="ayu-Tb-kmf">
@@ -56,7 +56,7 @@
                         </connections>
                     </textField>
                     <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="wCp-nB-dda">
-                        <rect key="frame" x="18" y="299" width="439" height="17"/>
+                        <rect key="frame" x="18" y="377" width="439" height="17"/>
                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="center" title="Don't change these preferences if you have no idea what are they." id="8wL-qv-5nD">
                             <font key="font" metaFont="system"/>
                             <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
@@ -64,13 +64,13 @@
                         </textFieldCell>
                     </textField>
                     <box verticalHuggingPriority="750" title="Box" boxType="separator" titlePosition="noTitle" translatesAutoresizingMaskIntoConstraints="NO" id="JBW-8M-eHP">
-                        <rect key="frame" x="36" y="288" width="405" height="5"/>
+                        <rect key="frame" x="36" y="366" width="405" height="5"/>
                         <color key="borderColor" white="0.0" alpha="0.41999999999999998" colorSpace="calibratedWhite"/>
                         <color key="fillColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
                         <font key="titleFont" metaFont="system"/>
                     </box>
                     <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="S5h-Xx-HUG">
-                        <rect key="frame" x="27" y="226" width="204" height="17"/>
+                        <rect key="frame" x="27" y="304" width="204" height="17"/>
                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Local Socks5 Listen Port:" id="qRs-ow-vVB">
                             <font key="font" metaFont="system"/>
                             <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
@@ -78,7 +78,7 @@
                         </textFieldCell>
                     </textField>
                     <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="xWv-tc-lQe">
-                        <rect key="frame" x="27" y="263" width="204" height="17"/>
+                        <rect key="frame" x="27" y="341" width="204" height="17"/>
                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Local Socks5 Listen Address:" id="cwr-n0-zwn">
                             <font key="font" metaFont="system"/>
                             <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
@@ -86,7 +86,7 @@
                         </textFieldCell>
                     </textField>
                     <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="Q2L-Fh-TW1">
-                        <rect key="frame" x="237" y="260" width="160" height="22"/>
+                        <rect key="frame" x="237" y="338" width="160" height="22"/>
                         <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" sendsActionOnEndEditing="YES" state="on" borderStyle="bezel" drawsBackground="YES" id="iRm-V5-3gu">
                             <font key="font" metaFont="system"/>
                             <color key="textColor" name="textColor" catalog="System" colorSpace="catalog"/>
@@ -135,7 +135,7 @@
                         </connections>
                     </button>
                     <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="XQ5-fw-o8t">
-                        <rect key="frame" x="237" y="223" width="60" height="22"/>
+                        <rect key="frame" x="237" y="301" width="60" height="22"/>
                         <constraints>
                             <constraint firstAttribute="width" constant="60" id="reo-ha-VKi"/>
                         </constraints>
@@ -174,6 +174,44 @@
                             <binding destination="pR1-Bo-AWz" name="value" keyPath="values.LocalSocks5.EnableVerboseMode" id="Nu9-zu-vUE"/>
                         </connections>
                     </button>
+                    <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="bh0-H9-9hI">
+                        <rect key="frame" x="93" y="231" width="138" height="17"/>
+                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Local PAC Listen Port:" id="PSg-XK-qhl">
+                            <font key="font" metaFont="system"/>
+                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
+                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
+                        </textFieldCell>
+                    </textField>
+                    <textField verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="WF3-m7-I1v">
+                        <rect key="frame" x="237" y="265" width="160" height="22"/>
+                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" sendsActionOnEndEditing="YES" state="on" borderStyle="bezel" drawsBackground="YES" id="8wf-uK-tGn">
+                            <font key="font" metaFont="system"/>
+                            <color key="textColor" name="textColor" catalog="System" colorSpace="catalog"/>
+                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
+                        </textFieldCell>
+                        <connections>
+                            <binding destination="pR1-Bo-AWz" name="value" keyPath="values.PacServer.ListenAddress" id="4UF-xD-Z2q"/>
+                        </connections>
+                    </textField>
+                    <textField verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="wNM-6D-tgb">
+                        <rect key="frame" x="237" y="226" width="60" height="22"/>
+                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" selectable="YES" editable="YES" sendsActionOnEndEditing="YES" state="on" borderStyle="bezel" alignment="right" drawsBackground="YES" id="FXj-Bf-XDn">
+                            <font key="font" metaFont="system"/>
+                            <color key="textColor" name="textColor" catalog="System" colorSpace="catalog"/>
+                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
+                        </textFieldCell>
+                        <connections>
+                            <binding destination="pR1-Bo-AWz" name="value" keyPath="values.PacServer.ListenPort" id="Tb3-to-Ngs"/>
+                        </connections>
+                    </textField>
+                    <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="2UM-QO-GC5">
+                        <rect key="frame" x="69" y="268" width="162" height="17"/>
+                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Local PAC Listen Address:" id="dvL-Ic-Wae">
+                            <font key="font" metaFont="system"/>
+                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
+                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
+                        </textFieldCell>
+                    </textField>
                 </subviews>
                 <constraints>
                     <constraint firstItem="xWv-tc-lQe" firstAttribute="baseline" secondItem="Q2L-Fh-TW1" secondAttribute="baseline" id="0ub-69-rbe"/>
@@ -220,7 +258,7 @@
             <connections>
                 <outlet property="delegate" destination="-2" id="0bl-1N-AYu"/>
             </connections>
-            <point key="canvasLocation" x="346" y="288"/>
+            <point key="canvasLocation" x="346" y="327"/>
         </window>
         <numberFormatter formatterBehavior="default10_4" usesGroupingSeparator="NO" groupingSize="0" minimumIntegerDigits="0" maximumIntegerDigits="42" id="uE9-0u-CJW" userLabel="Port Number Formatter">
             <real key="minimum" value="128"/>
diff --git a/ShadowsocksX-NG/ProxyConfHelper.m b/ShadowsocksX-NG/ProxyConfHelper.m
index 357326e..7a146d6 100644
--- a/ShadowsocksX-NG/ProxyConfHelper.m
+++ b/ShadowsocksX-NG/ProxyConfHelper.m
@@ -197,9 +197,11 @@ GCDWebServer *webServer = nil;
         return [GCDWebServerDataResponse responseWithData: originalPACData contentType:@"application/x-ns-proxy-autoconfig"];
     }
      ];
-    int port = 8090;
+    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
+    NSString * address = [defaults stringForKey:@"PacServer.ListenAddress"];
+    int port = (short)[defaults integerForKey:@"PacServer.ListenPort"];
     [webServer startWithPort:port bonjourName:@"webserver"];
-    return [NSString stringWithFormat:@"%@%d%@",@"http://127.0.0.1:",port,routerPath];
+    return [NSString stringWithFormat:@"%@%@:%d%@",@"http://",address,port,routerPath];
 }
 
 + (void)stopPACServer {