diff --git a/launcher-bootstrap/src/main/java/com/skcraft/launcher/bootstrap/LauncherBinary.java b/launcher-bootstrap/src/main/java/com/skcraft/launcher/bootstrap/LauncherBinary.java
index 753ab2d..0935ca5 100644
--- a/launcher-bootstrap/src/main/java/com/skcraft/launcher/bootstrap/LauncherBinary.java
+++ b/launcher-bootstrap/src/main/java/com/skcraft/launcher/bootstrap/LauncherBinary.java
@@ -9,15 +9,11 @@
 import lombok.Getter;
 import lombok.extern.java.Log;
 
-import java.io.*;
-import java.util.jar.JarOutputStream;
-import java.util.jar.Pack200;
-import java.util.logging.Level;
+import java.io.File;
+import java.io.FileFilter;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import static com.skcraft.launcher.bootstrap.BootstrapUtils.closeQuietly;
-
 @Log
 public class LauncherBinary implements Comparable<LauncherBinary> {
 
@@ -38,41 +34,12 @@
         packed = m.group(2) != null;
     }
 
-    public File getExecutableJar() throws IOException {
+    public File getExecutableJar() throws PackedJarException {
         if (packed) {
-            log.log(Level.INFO, "Need to unpack " + path.getAbsolutePath());
+            log.warning("Launcher binary " + path.getAbsolutePath() + " is a pack200 file, which is " +
+                    "no longer supported.");
 
-            String packName = path.getName();
-            File outputPath = new File(path.getParentFile(), packName.substring(0, packName.length() - 5));
-
-            if (outputPath.exists()) {
-                return outputPath;
-            }
-
-            FileInputStream fis = null;
-            BufferedInputStream bis = null;
-            FileOutputStream fos = null;
-            BufferedOutputStream bos = null;
-            JarOutputStream jos = null;
-
-            try {
-                fis = new FileInputStream(path);
-                bis = new BufferedInputStream(fis);
-                fos = new FileOutputStream(outputPath);
-                bos = new BufferedOutputStream(fos);
-                jos = new JarOutputStream(bos);
-                Pack200.newUnpacker().unpack(bis, jos);
-            } finally {
-                closeQuietly(jos);
-                closeQuietly(bos);
-                closeQuietly(fos);
-                closeQuietly(bis);
-                closeQuietly(fis);
-            }
-
-            path.delete();
-
-            return outputPath;
+            throw new PackedJarException("Cannot unpack .jar.pack files!");
         } else {
             return path;
         }
@@ -105,4 +72,10 @@
             return file.isFile() && LauncherBinary.PATTERN.matcher(file.getName()).matches();
         }
     }
+
+    public static class PackedJarException extends Exception {
+        public PackedJarException(String message) {
+            super(message);
+        }
+    }
 }
diff --git a/launcher/src/main/java/com/skcraft/launcher/selfupdate/LatestVersionInfo.java b/launcher/src/main/java/com/skcraft/launcher/selfupdate/LatestVersionInfo.java
index 58f264f..80ff6a9 100644
--- a/launcher/src/main/java/com/skcraft/launcher/selfupdate/LatestVersionInfo.java
+++ b/launcher/src/main/java/com/skcraft/launcher/selfupdate/LatestVersionInfo.java
@@ -15,6 +15,6 @@
 
     private String version;
     private URL url;
-    private boolean packed = true;
+    private boolean packed;
 
 }