diff --git a/pom.xml b/pom.xml
index e4f8114..785f88e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.wolandsoft.sss</groupId>
 	<artifactId>pc-receiver</artifactId>
-	<version>1.4.0.0</version>
+	<version>1.4.1.1</version>
 	<name>SssPcReceiver</name>
 	<description>PC Receiver for Simple Secret Storage</description>
 	<dependencies>
diff --git a/runtime/launch4j_windows.xml b/runtime/launch4j_windows.xml
index 8857265..8f2c05e 100644
--- a/runtime/launch4j_windows.xml
+++ b/runtime/launch4j_windows.xml
@@ -2,7 +2,7 @@
 <launch4jConfig>
   <dontWrapJar>true</dontWrapJar>
   <headerType>gui</headerType>
-  <jar>pc-receiver-1.4.0.0.jar</jar>
+  <jar>pc-receiver-1.4.1.1.jar</jar>
   <outfile>..\target\SiestoPcReceiver.exe</outfile>
   <errTitle></errTitle>
   <cmdLine></cmdLine>
@@ -28,12 +28,12 @@
     <runtimeBits>64/32</runtimeBits>
   </jre>
   <versionInfo>
-    <fileVersion>1.4.0.0</fileVersion>
-    <txtFileVersion>1.4.0.0</txtFileVersion>
+    <fileVersion>1.4.1.1</fileVersion>
+    <txtFileVersion>1.4.1.1</txtFileVersion>
     <fileDescription>Siesto PC-Receiver</fileDescription>
     <copyright>Wolandsoft (Alexander Shulgin)</copyright>
-    <productVersion>1.4.0.0</productVersion>
-    <txtProductVersion>1.4.0.0</txtProductVersion>
+    <productVersion>1.4.1.1</productVersion>
+    <txtProductVersion>1.4.1.1</txtProductVersion>
     <productName>Siesto PC-Receiver</productName>
     <companyName></companyName>
     <internalName>Siesto PC-Receiver</internalName>
diff --git a/src/main/java/com/wolandsoft/sss/pcr/Receiver.java b/src/main/java/com/wolandsoft/sss/pcr/Receiver.java
index 488b859..8594c25 100644
--- a/src/main/java/com/wolandsoft/sss/pcr/Receiver.java
+++ b/src/main/java/com/wolandsoft/sss/pcr/Receiver.java
@@ -21,9 +21,15 @@
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
 import java.nio.charset.StandardCharsets;
 import java.security.GeneralSecurityException;
 import java.util.Base64;
+import java.util.Collections;
+import java.util.Enumeration;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.zip.CRC32;
@@ -44,6 +50,7 @@
 import com.wolandsoft.sss.pcr.ui.TrayIconUI.TrayIconListener;
 
 public class Receiver implements TrayIconListener, ServerDataListener {
+    private static final int PROTOCOL_VER = 1;
     private static final Logger logger = Logger.getLogger(Receiver.class.getName());
 
     public static void main(String[] args) throws InterruptedException {
@@ -89,14 +96,18 @@ private void hideQRCode() {
     @Override
     public void onShowKey() {
 	hideQRCode();
-
+        
 	try {
 	    ByteArrayOutputStream baos = new ByteArrayOutputStream();
 	    DataOutputStream dos = new DataOutputStream(baos);
+	    // store IP
+	    byte[] host = mServer.getIP();
+	    dos.writeInt(host.length);
+	    dos.write(host, 0, host.length);
 	    // store port
 	    dos.writeInt(mServer.getPort());
 	    //store host
-	    byte[] host = mServer.getHost().getBytes(StandardCharsets.UTF_8);
+	    host = mServer.getHost().getBytes(StandardCharsets.UTF_8);
 	    dos.writeInt(host.length);
 	    dos.write(host, 0, host.length);
 	    // store key
@@ -109,6 +120,7 @@ public void onShowKey() {
 	    checksum.update(payload, 0, payload.length);
 	    long checksumValue = checksum.getValue();
 	    baos.reset();
+	    dos.writeInt(PROTOCOL_VER);
 	    dos.writeLong(checksumValue);
 	    dos.writeInt(payload.length);
 	    dos.write(payload);
diff --git a/src/main/java/com/wolandsoft/sss/pcr/server/TcpServer.java b/src/main/java/com/wolandsoft/sss/pcr/server/TcpServer.java
index c52deeb..e038d4e 100644
--- a/src/main/java/com/wolandsoft/sss/pcr/server/TcpServer.java
+++ b/src/main/java/com/wolandsoft/sss/pcr/server/TcpServer.java
@@ -18,10 +18,12 @@
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.DatagramSocket;
 import java.net.InetAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
 import java.net.SocketException;
+import java.net.UnknownHostException;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.prefs.Preferences;
@@ -67,7 +69,7 @@ public void run() {
 		logger.log(Level.WARNING, e.getMessage(), e);
 	    }
 	    byte[] data = baOutStream.toByteArray();
-	    if(data.length > 0) {
+	    if (data.length > 0) {
 		mListener.onDataReceived(data);
 	    }
 	}
@@ -89,6 +91,15 @@ public int getPort() {
 	return mPort;
     }
 
+    public byte[] getIP() {
+	try (final DatagramSocket socket = new DatagramSocket()) {
+	    socket.connect(InetAddress.getByName("8.8.8.8"), 10002);
+	    return socket.getLocalAddress().getAddress();
+	} catch (UnknownHostException | SocketException ignore) {
+	    return mLocalAddress.getAddress();
+	}
+    }
+
     public String getHost() {
 	return mLocalAddress.getHostName();
     }