--- a/src/main.cpp	Thu Nov 08 19:15:43 2018 +0900
+++ b/src/main.cpp	Mon Nov 12 19:35:50 2018 +0900
@@ -1,11 +1,14 @@
 // Filename   : main.cpp
-// Last Change: 2018-11-01 木 11:39:22.
+// Last Change: 2018-11-09 金 11:54:20.
 //
 
 #include <wx/socket.h>
+#include <wx/sstream.h>
+#include <wx/protocol/http.h>
 #include "id.h"
 #include "main.h"
 #include "auth.h"
+#include "net.h"
 #include "rsearcher.h"
 
 IMPLEMENT_APP( MyApp )
@@ -24,10 +27,26 @@
 {
     if ( !wxApp::OnInit() ) return false;
 
+	InitSetting();
+
+	// Check New-Version
+	wxString newver = GetVersion();
+	if ( newver.Cmp( RSVER ) == 1 ) {	// 1.9 -> 1.91 -> 1.92 ...
+		wxString sv = wxString::Format( wxT( "%s:%d" ), m_serveraddr, m_serverport );
+
+		wxArrayString args;
+		args.Add( wxT( "upgrade.bat" ) );
+		args.Add( sv );
+		args.Add( RSVER );
+		args.Add( newver );
+
+		wxExecute( wxJoin( args, ' ', '\\' ) );
+		return false;
+	}
+
     wxImage::AddHandler( new wxJPEGHandler );
     wxImage::AddHandler( new wxPNGHandler  );
 	wxFileSystem::AddHandler( new wxZipFSHandler );
-	InitSetting();
 
 	// Main Window
 	MainFrame *mainframe = new MainFrame( NULL, ID_MAIN, wxEmptyString, wxPoint( rect.x, rect.y ), rect.GetSize(), wxDEFAULT_FRAME_STYLE );
@@ -175,6 +194,28 @@
 	delete fs;
 }
 
+wxString MyApp::GetVersion( void )
+{
+	wxHTTP get;
+	get.SetTimeout( 30 );
+	get.SetFlags( wxSOCKET_WAITALL|wxSOCKET_BLOCK );
+	while ( !get.Connect( m_serveraddr, m_serverport ) )
+		wxSleep( 1 );
+
+	wxString version;
+	wxString url = wxT( "/release/version" );
+	wxInputStream *http_istream = get.GetInputStream( url );
+	if ( get.GetError() == wxPROTO_NOERR ) {
+		wxStringOutputStream out_stream( &version );
+		http_istream->Read( out_stream );
+	}
+
+	wxDELETE( http_istream );
+	get.Close();
+
+	return version;
+}
+
 void MyApp::RemoveFile( wxString pattern )
 {
 	wxString file = wxFindFirstFile( pattern );