diff --git a/HMCL/build.gradle b/HMCL/build.gradle
index eba7524a3..3f1b9bd63 100644
--- a/HMCL/build.gradle
+++ b/HMCL/build.gradle
@@ -117,7 +117,7 @@ task makePack(dependsOn: jar) {
 
 task makePackXz(dependsOn: makePack) doLast {
     def packXz = new File(makePack.outputPath.parentFile, makePack.outputPath.name + ".xz")
-    new XZOutputStream(packXz.newOutputStream(), new LZMA2Options(9)).withCloseable { it << makePack.outputPath.bytes }
+    new XZOutputStream(packXz.newOutputStream(), new LZMA2Options(6)).withCloseable { it << makePack.outputPath.bytes }
     createChecksum(packXz)
 }
 
diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/JarUtils.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/JarUtils.java
index 3147c39be..f26f8f75f 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/JarUtils.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/JarUtils.java
@@ -33,7 +33,7 @@ import java.util.jar.Manifest;
 public final class JarUtils {
 
     public static Optional<Path> thisJar() {
-        CodeSource codeSource = FileUtils.class.getProtectionDomain().getCodeSource();
+        CodeSource codeSource = JarUtils.class.getProtectionDomain().getCodeSource();
         if (codeSource == null) {
             return Optional.empty();
         }