diff --git a/bootstrap/src/main/java/io/izzel/arclight/boot/asm/InventoryImplementer.java b/bootstrap/src/main/java/io/izzel/arclight/boot/asm/InventoryImplementer.java
index a2655833..d1b01565 100644
--- a/bootstrap/src/main/java/io/izzel/arclight/boot/asm/InventoryImplementer.java
+++ b/bootstrap/src/main/java/io/izzel/arclight/boot/asm/InventoryImplementer.java
@@ -8,6 +8,7 @@
 import org.objectweb.asm.tree.ClassNode;
 import org.objectweb.asm.tree.FieldInsnNode;
 import org.objectweb.asm.tree.FieldNode;
+import org.objectweb.asm.tree.FrameNode;
 import org.objectweb.asm.tree.InsnList;
 import org.objectweb.asm.tree.InsnNode;
 import org.objectweb.asm.tree.JumpInsnNode;
@@ -72,7 +73,9 @@ private boolean tryImplement(ClassNode node) {
             list.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, Type.getInternalName(Integer.class), "intValue", "()I", false));
             list.add(new InsnNode(Opcodes.IRETURN));
             list.add(labelNode);
+            list.add(new FrameNode(Opcodes.F_SAME1, 0,  null, 1, new Object[]{Type.getInternalName(Integer.class)}));
             list.add(new InsnNode(Opcodes.POP));
+            stackLimitMethod.maxStack = Math.max(2, stackLimitMethod.maxStack);
             stackLimitMethod.instructions.insert(list);
             {
                 MethodNode methodNode = new MethodNode(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, "setMaxStackSize", "(I)V", null, null);
@@ -83,6 +86,8 @@ private boolean tryImplement(ClassNode node) {
                 insnList.add(new FieldInsnNode(Opcodes.PUTFIELD, node.name, maxStack.name, maxStack.desc));
                 insnList.add(new InsnNode(Opcodes.RETURN));
                 methodNode.instructions = insnList;
+                methodNode.maxLocals = 2;
+                methodNode.maxStack = 2;
                 node.methods.add(methodNode);
             }
             return true;