diff --git a/dexmaker/src/main/java/external/com/android/dx/DexMaker.java b/dexmaker/src/main/java/external/com/android/dx/DexMaker.java
index 4cfd282ad..b4de0e360 100644
--- a/dexmaker/src/main/java/external/com/android/dx/DexMaker.java
+++ b/dexmaker/src/main/java/external/com/android/dx/DexMaker.java
@@ -483,7 +483,7 @@ public ClassLoader loadClassDirect(ClassLoader parent, File dexCache, String dex
     }
 
     public ClassLoader generateAndLoad(ClassLoader parent, File dexCache) throws IOException {
-        return generateAndLoad(parent, dexCache, generateFileName());
+        return generateAndLoad(parent, dexCache, generateFileName(), false);
     }
 
     /**
@@ -512,7 +512,7 @@ public ClassLoader generateAndLoad(ClassLoader parent, File dexCache) throws IOE
      *     dex files will be written. If null, this class will try to guess the
      *     application's private data dir.
      */
-    public ClassLoader generateAndLoad(ClassLoader parent, File dexCache, String dexFileName) throws IOException {
+    public ClassLoader generateAndLoad(ClassLoader parent, File dexCache, String dexFileName, boolean deleteOld) throws IOException {
         if (dexCache == null) {
             String property = System.getProperty("dexmaker.dexcache");
             if (property != null) {
@@ -529,9 +529,14 @@ public ClassLoader generateAndLoad(ClassLoader parent, File dexCache, String dex
         File result = new File(dexCache, dexFileName);
 
         if (result.exists()) {
-            try {
-                deleteOldDex(result);
-            } catch (Throwable throwable) {}
+            if (deleteOld) {
+                try {
+                    deleteOldDex(result);
+                } catch (Throwable throwable) {
+                }
+            } else {
+                return generateClassLoader(result, dexCache, parent);
+            }
         }
 
         byte[] dex = generate();
diff --git a/sandhook/build.gradle b/sandhook/build.gradle
index 8a3f87fb2..14599c527 100644
--- a/sandhook/build.gradle
+++ b/sandhook/build.gradle
@@ -26,7 +26,6 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation 'com.jakewharton.android.repackaged:dalvik-dx:9.0.0_r3'
     implementation 'com.swift.sandhook:hooklib:3.0.1'
     compileOnly project(':dexmaker')
     compileOnly project(':xposedapi')
diff --git a/sandhook/src/main/java/com/swift/sandhook/xposedcompat/methodgen/HookerDexMaker.java b/sandhook/src/main/java/com/swift/sandhook/xposedcompat/methodgen/HookerDexMaker.java
index 19294727d..2092b3856 100644
--- a/sandhook/src/main/java/com/swift/sandhook/xposedcompat/methodgen/HookerDexMaker.java
+++ b/sandhook/src/main/java/com/swift/sandhook/xposedcompat/methodgen/HookerDexMaker.java
@@ -218,7 +218,7 @@ private HookWrapper.HookEntity doMake(String className, String dexName) throws E
             throw new IllegalArgumentException("dexDirPath should not be empty!!!");
         }
         // Create the dex file and load it.
-        loader = mDexMaker.generateAndLoad(mAppClassLoader, new File(mDexDirPath), dexName);
+        loader = mDexMaker.generateAndLoad(mAppClassLoader, new File(mDexDirPath), dexName, true);
         return loadHookerClass(loader, className);
     }
 
diff --git a/sandhook/src/main/java/com/swift/sandhook/xposedcompat/methodgen/HookerDexMakerNew.java b/sandhook/src/main/java/com/swift/sandhook/xposedcompat/methodgen/HookerDexMakerNew.java
index 1303a3ffa..f3399c821 100644
--- a/sandhook/src/main/java/com/swift/sandhook/xposedcompat/methodgen/HookerDexMakerNew.java
+++ b/sandhook/src/main/java/com/swift/sandhook/xposedcompat/methodgen/HookerDexMakerNew.java
@@ -172,7 +172,7 @@ private HookWrapper.HookEntity doMake(String className, String dexName) throws E
             throw new IllegalArgumentException("dexDirPath should not be empty!!!");
         }
         // Create the dex file and load it.
-        loader = mDexMaker.generateAndLoad(mAppClassLoader, new File(mDexDirPath), dexName);
+        loader = mDexMaker.generateAndLoad(mAppClassLoader, new File(mDexDirPath), dexName, true);
         return loadHookerClass(loader, className);
     }
 
diff --git a/sandhook/src/main/java/com/swift/sandhook/xposedcompat/utils/DexMakerUtils.java b/sandhook/src/main/java/com/swift/sandhook/xposedcompat/utils/DexMakerUtils.java
index 909e59acc..ad9142df2 100644
--- a/sandhook/src/main/java/com/swift/sandhook/xposedcompat/utils/DexMakerUtils.java
+++ b/sandhook/src/main/java/com/swift/sandhook/xposedcompat/utils/DexMakerUtils.java
@@ -1,16 +1,4 @@
 package com.swift.sandhook.xposedcompat.utils;
-import external.com.android.dx.Code;
-import external.com.android.dx.Local;
-import external.com.android.dx.TypeId;
-import com.android.dx.rop.code.Insn;
-import com.android.dx.rop.code.PlainInsn;
-import com.android.dx.rop.code.RegisterSpec;
-import com.android.dx.rop.code.RegisterSpecList;
-import com.android.dx.rop.code.Rops;
-import com.android.dx.rop.code.SourcePosition;
-import com.android.dx.rop.type.Type;
-
-import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.math.BigInteger;
 import java.security.MessageDigest;
@@ -18,6 +6,10 @@
 import java.util.HashMap;
 import java.util.Map;
 
+import external.com.android.dx.Code;
+import external.com.android.dx.Local;
+import external.com.android.dx.TypeId;
+
 public class DexMakerUtils {
 
 
@@ -219,44 +211,6 @@ public static void returnRightValue(Code code, Class<?> returnType, Map<Class, L
         code.returnValue(resultLocals.get(returnType));
     }
 
-    public static void moveException(Code code, Local<?> result) {
-        addInstruction(code, new PlainInsn(Rops.opMoveException(Type.THROWABLE),
-                SourcePosition.NO_INFO, spec(result), RegisterSpecList.EMPTY));
-    }
-
-    public static void addInstruction(Code code, Insn insn) {
-        if (addInstMethod == null) {
-            try {
-                addInstMethod = Code.class.getDeclaredMethod("addInstruction", Insn.class);
-                addInstMethod.setAccessible(true);
-            } catch (NoSuchMethodException e) {
-                e.printStackTrace();
-            }
-        }
-        try {
-            addInstMethod.invoke(code, insn);
-        } catch (IllegalAccessException | InvocationTargetException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public static RegisterSpec spec(Local<?> result) {
-        if (specMethod == null) {
-            try {
-                specMethod = Local.class.getDeclaredMethod("spec");
-                specMethod.setAccessible(true);
-            } catch (NoSuchMethodException e) {
-                e.printStackTrace();
-            }
-        }
-        try {
-            return (RegisterSpec) specMethod.invoke(result);
-        } catch (IllegalAccessException | InvocationTargetException e) {
-            e.printStackTrace();
-            return null;
-        }
-    }
-
     public static String MD5(String source) {
         try {
             MessageDigest messageDigest = MessageDigest.getInstance("MD5");