diff --git a/libLauncher/src/main/java/ru/gravit/utils/downloader/Downloader.java b/libLauncher/src/main/java/ru/gravit/utils/downloader/Downloader.java
index f6d32b05..e7116c49 100644
--- a/libLauncher/src/main/java/ru/gravit/utils/downloader/Downloader.java
+++ b/libLauncher/src/main/java/ru/gravit/utils/downloader/Downloader.java
@@ -6,69 +6,138 @@
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.security.cert.Certificate;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
 
+import javax.net.ssl.HttpsURLConnection;
+
 import ru.gravit.utils.helper.IOHelper;
 import ru.gravit.utils.helper.LogHelper;
 
 public class Downloader implements Runnable {
-    public static final int INTERVAL = 300;
-    
-    public AtomicInteger writed = new AtomicInteger(0);
-    private final File file;
-    private final URL url;
-    public final AtomicBoolean interrupt = new AtomicBoolean(false);
-    public final AtomicBoolean interrupted = new AtomicBoolean(false);
-	private final int skip;
-	
+	@FunctionalInterface
+	public static interface Handler {
+		public void check(Certificate[] certs) throws IOException;
+	}
+
+	public static final int INTERVAL = 300;
+
+	private final File file;
+	private final URL url;
+	public AtomicInteger writed = new AtomicInteger(0);
+	public final AtomicBoolean interrupt = new AtomicBoolean(false);
+	public final AtomicBoolean interrupted = new AtomicBoolean(false);
 	public AtomicReference<Throwable> ex = new AtomicReference<>(null);
-	
+	private final int skip;
+	private final Handler handler;
+
 	public Downloader(URL url, File file) {
 		this.file = file;
-        this.url = url;
-        this.skip = 0;
-    }
+		this.url = url;
+		this.skip = 0;
+		this.handler = null;
+	}
 
 	public Downloader(URL url, File file, int skip) {
 		this.file = file;
-        this.url = url;
-        this.skip = skip;
-    }
-	
-    public File getFile() {
-        return file;
-    }
+		this.url = url;
+		this.skip = skip;
+		this.handler = null;
+	}
 
-    public void downloadFile() throws IOException {
-    	if (!(url.getProtocol().equalsIgnoreCase("http") || url.getProtocol().equalsIgnoreCase("https"))) throw new IOException("Invalid protocol.");
-        HttpURLConnection connect = (HttpURLConnection) (url).openConnection();
-        connect.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11"); // for stupid servers
-        connect.setInstanceFollowRedirects(true);
-        if (!(connect.getResponseCode() >= 200 && connect.getResponseCode() < 300)) throw new IOException(String.format("Invalid response of http server %d.", connect.getResponseCode()));
-        try (BufferedInputStream in = new BufferedInputStream(connect.getInputStream(), IOHelper.BUFFER_SIZE); FileOutputStream fout = new FileOutputStream(file, skip != 0)) {
-            final byte data[] = new byte[IOHelper.BUFFER_SIZE];
-            int count = -1;
-            long timestamp = System.currentTimeMillis();
-            int writed_local = 0;
-            in.skip(skip);
-            while ((count = in.read(data)) != -1) {
-                fout.write(data, 0, count);
-                writed_local += count;
-                if (System.currentTimeMillis() - timestamp > INTERVAL) {
-                    writed.set(writed_local);
-                    LogHelper.debug("Downloaded %d", writed_local);
-                    if (interrupt.get()) {
-                    	break;
-                    }
-                }
-            }
-            LogHelper.debug("Downloaded %d", writed_local);
-            writed.set(writed_local);
-        }
-        interrupted.set(true);
-    }
+	public Downloader(URL url, File file, Handler handler) {
+		this.file = file;
+		this.url = url;
+		this.skip = 0;
+		this.handler = handler;
+	}
+
+	public Downloader(URL url, File file, int skip, Handler handler) {
+		this.file = file;
+		this.url = url;
+		this.skip = skip;
+		this.handler = handler;
+	}
+	
+	public File getFile() {
+		return file;
+	}
+
+	public Handler getHandler() {
+		return handler;
+	}
+	
+	public void downloadFile() throws IOException {
+		if (!(url.getProtocol().equalsIgnoreCase("http") || url.getProtocol().equalsIgnoreCase("https")))
+			throw new IOException("Invalid protocol.");
+		interrupted.set(false);
+		if (url.getProtocol().equalsIgnoreCase("http")) {
+			HttpURLConnection connect = (HttpURLConnection) (url).openConnection();
+			connect.setRequestProperty("User-Agent",
+					"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11"); // for
+																																		// stupid
+																																		// servers
+			connect.setInstanceFollowRedirects(true);
+			if (!(connect.getResponseCode() >= 200 && connect.getResponseCode() < 300))
+				throw new IOException(String.format("Invalid response of http server %d.", connect.getResponseCode()));
+			try (BufferedInputStream in = new BufferedInputStream(connect.getInputStream(), IOHelper.BUFFER_SIZE);
+					FileOutputStream fout = new FileOutputStream(file, skip != 0)) {
+				final byte data[] = new byte[IOHelper.BUFFER_SIZE];
+				int count = -1;
+				long timestamp = System.currentTimeMillis();
+				int writed_local = 0;
+				in.skip(skip);
+				while ((count = in.read(data)) != -1) {
+					fout.write(data, 0, count);
+					writed_local += count;
+					if (System.currentTimeMillis() - timestamp > INTERVAL) {
+						writed.set(writed_local);
+						LogHelper.debug("Downloaded %d", writed_local);
+						if (interrupt.get()) {
+							break;
+						}
+					}
+				}
+				LogHelper.debug("Downloaded %d", writed_local);
+				writed.set(writed_local);
+			}
+		} else {
+			HttpsURLConnection connect = (HttpsURLConnection) (url).openConnection();
+			connect.setRequestProperty("User-Agent",
+					"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11"); // for
+																																		// stupid
+																																		// servers
+			connect.setInstanceFollowRedirects(true);
+			if (handler != null)
+				handler.check(connect.getServerCertificates());
+			if (!(connect.getResponseCode() >= 200 && connect.getResponseCode() < 300))
+				throw new IOException(String.format("Invalid response of http server %d.", connect.getResponseCode()));
+			try (BufferedInputStream in = new BufferedInputStream(connect.getInputStream(), IOHelper.BUFFER_SIZE);
+					FileOutputStream fout = new FileOutputStream(file, skip != 0)) {
+				final byte data[] = new byte[IOHelper.BUFFER_SIZE];
+				int count = -1;
+				long timestamp = System.currentTimeMillis();
+				int writed_local = 0;
+				in.skip(skip);
+				while ((count = in.read(data)) != -1) {
+					fout.write(data, 0, count);
+					writed_local += count;
+					if (System.currentTimeMillis() - timestamp > INTERVAL) {
+						writed.set(writed_local);
+						LogHelper.debug("Downloaded %d", writed_local);
+						if (interrupt.get()) {
+							break;
+						}
+					}
+				}
+				LogHelper.debug("Downloaded %d", writed_local);
+				writed.set(writed_local);
+			}
+		}
+		interrupted.set(true);
+	}
 
 	@Override
 	public void run() {
@@ -77,6 +146,6 @@ public void run() {
 		} catch (Throwable ex) {
 			this.ex.set(ex);
 			LogHelper.error(ex);
-		}		
+		}
 	}
 }