diff --git a/Loader/src/main/java/de/com/baseband/launcher/Loader.java b/Loader/src/main/java/de/com/baseband/launcher/Loader.java
index 44478ce..94ac76c 100644
--- a/Loader/src/main/java/de/com/baseband/launcher/Loader.java
+++ b/Loader/src/main/java/de/com/baseband/launcher/Loader.java
@@ -392,9 +392,14 @@ public class Loader implements Util {
             InputStream stream = urlStream;
             if(filename != null) {
                 byte[] bytes = new StreamReader(stream).readAllAsBytes();
-                try(FileOutputStream os = new FileOutputStream(filename)) {
+                try(FileOutputStream os = new FileOutputStream(filename + ".tmp")) {
                     os.write(bytes);
                 } catch (IOException ignored) { }
+                Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+                    File f = new File(filename);
+                    f.delete();
+                    new File(filename + ".tmp").renameTo(f);
+                }));
                 stream = new ByteArrayInputStream(bytes);
             }
             ZipInputStream jar = new ZipInputStream(stream);