diff --git a/arclight-forge/src/main/java/io/izzel/arclight/boot/application/ApplicationBootstrap.java b/arclight-forge/src/main/java/io/izzel/arclight/boot/application/ApplicationBootstrap.java
index 45e19751..2fe45d9e 100644
--- a/arclight-forge/src/main/java/io/izzel/arclight/boot/application/ApplicationBootstrap.java
+++ b/arclight-forge/src/main/java/io/izzel/arclight/boot/application/ApplicationBootstrap.java
@@ -5,6 +5,11 @@ import io.izzel.arclight.api.Unsafe;
 import io.izzel.arclight.boot.AbstractBootstrap;
 import io.izzel.arclight.i18n.ArclightConfig;
 import io.izzel.arclight.i18n.ArclightLocale;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
 
 import java.util.ServiceLoader;
 import java.util.function.Consumer;
@@ -36,6 +41,7 @@ public class ApplicationBootstrap extends AbstractBootstrap implements Consumer<
         try {
             this.setupMod();
             this.dirtyHacks();
+            this.hackModlauncher();
             ServiceLoader.load(getClass().getModule().getLayer(), Consumer.class).stream()
                 .filter(it -> !it.type().getName().contains("arclight"))
                 .findFirst().orElseThrow().get().accept(args);
@@ -44,4 +50,31 @@ public class ApplicationBootstrap extends AbstractBootstrap implements Consumer<
             System.err.println("Fail to launch Arclight.");
         }
     }
+
+    private void hackModlauncher() throws Exception {
+        try (var in = getClass().getClassLoader().getResourceAsStream("cpw/mods/modlauncher/TransformerClassWriter$SuperCollectingVisitor.class")) {
+            var cw = new ClassWriter(0);
+            var cr = new ClassReader(in);
+            cr.accept(new ClassVisitor(Opcodes.ASM9, cw) {
+                @Override
+                public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
+                    var mv = super.visitMethod(access, name, descriptor, signature, exceptions);
+                    if (name.equals("<init>")) {
+                        return new MethodVisitor(Opcodes.ASM9, mv) {
+                            @Override
+                            public void visitLdcInsn(Object value) {
+                                if (value.equals(Opcodes.ASM7)) {
+                                    super.visitLdcInsn(Opcodes.ASM9);
+                                } else {
+                                    super.visitLdcInsn(value);
+                                }
+                            }
+                        };
+                    } else return mv;
+                }
+            }, 0);
+            var bytes = cw.toByteArray();
+            Unsafe.defineClass(cr.getClassName(), bytes, 0, bytes.length, getClass().getClassLoader(), getClass().getProtectionDomain());
+        }
+    }
 }