diff --git a/src/main/java/core/packetproxy/ProxySSLTransparent.java b/src/main/java/core/packetproxy/ProxySSLTransparent.java
index 31e77e1..15108f1 100644
--- a/src/main/java/core/packetproxy/ProxySSLTransparent.java
+++ b/src/main/java/core/packetproxy/ProxySSLTransparent.java
@@ -138,7 +138,7 @@ private void checkTransparentSSLProxy(Socket client, int proxyPort) throws Excep
 			WrapEndpoint wep_e = new WrapEndpoint(client_e, ArrayUtils.subarray(buff, 0, length));
 			InetSocketAddress serverAddr = new InetSocketAddress(serverName, proxyPort);
 			Server server = Servers.getInstance().queryByAddress(serverAddr);
-			SSLSocketEndpoint server_e = new SSLSocketEndpoint(serverAddr, serverName);
+			SSLSocketEndpoint server_e = new SSLSocketEndpoint(serverAddr, serverName, null);
 			createConnection(wep_e, server_e, server);
 
 		} else {
diff --git a/src/main/java/core/packetproxy/common/EndpointFactory.java b/src/main/java/core/packetproxy/common/EndpointFactory.java
index 86a6ec4..5c688e9 100644
--- a/src/main/java/core/packetproxy/common/EndpointFactory.java
+++ b/src/main/java/core/packetproxy/common/EndpointFactory.java
@@ -22,7 +22,6 @@
 
 import javax.net.ssl.SSLSocket;
 
-import packetproxy.http.Http;
 import packetproxy.http.Https;
 import packetproxy.model.OneShotPacket;
 import packetproxy.model.Server;
@@ -61,7 +60,7 @@ public static Endpoint createFromURI(String uri) throws Exception {
 		String host = u.getHost();
 		int port = u.getPort() > 0 ? u.getPort() : 80;
 		if (u.getScheme().equalsIgnoreCase("https")) {
-			return new SSLSocketEndpoint(new InetSocketAddress(host, port), host);
+			return new SSLSocketEndpoint(new InetSocketAddress(host, port), host, null);
 		} else if (u.getScheme().equalsIgnoreCase("http")) {
 			return new SocketEndpoint(new InetSocketAddress(host, port));
 		} else {
@@ -71,24 +70,16 @@ public static Endpoint createFromURI(String uri) throws Exception {
 	
 	public static Endpoint createFromOneShotPacket(OneShotPacket packet) throws Exception {
 		if (packet.getUseSSL()) {
-			return new SSLSocketEndpoint(packet.getServer(), packet.getServerName());
+			return new SSLSocketEndpoint(packet.getServer(), packet.getServerName(), packet.getAlpn());
 		} else {
 			// nc など複数同時接続を受け付けないconnection用に10秒でtimeoutする
 			return new SocketEndpoint(packet.getServer(), 10 * 1000);
 		}
 	}
 	
-	public static Endpoint createServerEndpointFromHttp(Http http) throws Exception {
-		if (http.isProxySsl()) {
-			return new SSLSocketEndpoint(http.getServerAddr(), http.getServerName());
-		} else {
-			return new SocketEndpoint(http.getServerAddr());
-		}
-	}
-
 	public static Endpoint createFromServer(Server server) throws Exception {
 		if (server.getUseSSL()) {
-			return new SSLSocketEndpoint(server.getAddress(), server.getIp());
+			return new SSLSocketEndpoint(server.getAddress(), server.getIp(), null);
 		} else {
 			return new SocketEndpoint(server.getAddress());
 		}
diff --git a/src/main/java/core/packetproxy/common/SSLSocketEndpoint.java b/src/main/java/core/packetproxy/common/SSLSocketEndpoint.java
index 0e8e8ea..afb3a18 100644
--- a/src/main/java/core/packetproxy/common/SSLSocketEndpoint.java
+++ b/src/main/java/core/packetproxy/common/SSLSocketEndpoint.java
@@ -27,20 +27,24 @@ public class SSLSocketEndpoint implements Endpoint
 {
 	protected SSLSocket socket;
 	protected String server_name;
+	protected String alpn;
 	
 	public SSLSocketEndpoint(SSLSocketEndpoint ep) {
 		this.server_name = ep.server_name;
 		this.socket = ep.socket;
+		this.alpn = ep.alpn;
 	}
 	
 	public SSLSocketEndpoint(SSLSocket socket, String SNIServerName) {
 		this.server_name = SNIServerName;
 		this.socket = socket;
+		this.alpn = socket.getApplicationProtocol();
 	}
 
-	public SSLSocketEndpoint(InetSocketAddress addr, String SNIServerName) throws Exception {
+	public SSLSocketEndpoint(InetSocketAddress addr, String SNIServerName, String alpn) throws Exception {
 		this.server_name = SNIServerName;
-		this.socket = Https.createClientSSLSocket(addr, SNIServerName);
+		this.alpn = alpn;
+		this.socket = Https.createClientSSLSocket(addr, SNIServerName, alpn);
 	}
 
 	@Override
diff --git a/src/main/java/core/packetproxy/http/Https.java b/src/main/java/core/packetproxy/http/Https.java
index f6de2f0..f008c0e 100644
--- a/src/main/java/core/packetproxy/http/Https.java
+++ b/src/main/java/core/packetproxy/http/Https.java
@@ -212,29 +212,39 @@ public PrivateKey getPrivateKey(String s) {
 		}
 	}};
 
-	public static SSLSocket convertToClientSSLSocket(Socket socket) throws Exception {
+	public static SSLSocket convertToClientSSLSocket(Socket socket, String alpn) throws Exception {
 		SSLSocketFactory ssf = createSSLSocketFactory();
 		SSLSocket sock = (SSLSocket) ssf.createSocket(socket, null, socket.getPort(), false);
 		SSLParameters sslp = sock.getSSLParameters();
-		String[] clientAPs ={ "h2", "http/1.1", "http/1.0" };
+		String[] clientAPs;
+		if (alpn != null && alpn.length() > 0) {
+			clientAPs = new String[]{ alpn };
+		} else {
+			clientAPs = new String[]{ "h2", "http/1.1", "http/1.0" };
+		}
 		sslp.setApplicationProtocols(clientAPs);
 		sock.setSSLParameters(sslp);
 		sock.startHandshake();
 		return sock;
 	}
 
-	public static SSLSocket createClientSSLSocket(InetSocketAddress addr) throws Exception {
+	public static SSLSocket createClientSSLSocket(InetSocketAddress addr, String alpn) throws Exception {
 		SSLSocketFactory ssf = createSSLSocketFactory();
 		SSLSocket sock = (SSLSocket) ssf.createSocket(addr.getAddress(), addr.getPort());
 		SSLParameters sslp = sock.getSSLParameters();
-		String[] clientAPs ={ "h2", "http/1.1", "http/1.0" };
+		String[] clientAPs;
+		if (alpn != null && alpn.length() > 0) {
+			clientAPs = new String[]{ alpn };
+		} else {
+			clientAPs = new String[]{ "h2", "http/1.1", "http/1.0" };
+		}
 		sslp.setApplicationProtocols(clientAPs);
 		sock.setSSLParameters(sslp);
 		sock.startHandshake();
 		return sock;
 	}
 
-	public static SSLSocket createClientSSLSocket(InetSocketAddress addr, String SNIServerName) throws Exception {
+	public static SSLSocket createClientSSLSocket(InetSocketAddress addr, String SNIServerName, String alpn) throws Exception {
 		/* SNI */
 		SNIHostName serverName = new SNIHostName(SNIServerName);
 		/* Fetch Client Certificate from ClientKeyManager */
@@ -244,7 +254,12 @@ public static SSLSocket createClientSSLSocket(InetSocketAddress addr, String SNI
 		SSLSocketFactory ssf = createSSLSocketFactory();
 		SSLSocket sock = (SSLSocket) ssf.createSocket(addr.getAddress(), addr.getPort());
 		SSLParameters sslp = sock.getSSLParameters();
-		String[] clientAPs ={ "h2", "http/1.1", "http/1.0" };
+		String[] clientAPs;
+		if (alpn != null && alpn.length() > 0) {
+			clientAPs = new String[]{ alpn };
+		} else {
+			clientAPs = new String[]{ "h2", "http/1.1", "http/1.0" };
+		}
 		sslp.setApplicationProtocols(clientAPs);
 
 		sock.setSSLParameters(sslp);