diff --git a/libs/apktool_2.3.3.jar b/libs/apktool_2.3.3.jar
deleted file mode 100755
index 6270407..0000000
Binary files a/libs/apktool_2.3.3.jar and /dev/null differ
diff --git a/libs/apktool_2.3.4.jar b/libs/apktool_2.3.4.jar
deleted file mode 100755
index 000e599..0000000
Binary files a/libs/apktool_2.3.4.jar and /dev/null differ
diff --git a/libs/apktool_2.4.1.jar b/libs/apktool_2.4.1.jar
new file mode 100644
index 0000000..2eca808
Binary files /dev/null and b/libs/apktool_2.4.1.jar differ
diff --git a/src/com/qy/utils/SmaliUtils.java b/src/com/qy/utils/SmaliUtils.java
index b9d9c6b..50e10c1 100755
--- a/src/com/qy/utils/SmaliUtils.java
+++ b/src/com/qy/utils/SmaliUtils.java
@@ -190,13 +190,16 @@ public class SmaliUtils {
 		}
 		return old;
 	}
-	
+	private boolean isEncryption=false;
 	public void unPack(String jarPath, SmaliApkToolsPath smaliApkToolsPath) {
 		File path=new File(jarPath+".out");
 		if(path.exists()&&path.isDirectory()) {
 			Tools.deleteFiles(path.getAbsolutePath());
 		}
 		String[] args =new String[] {"d","-f",jarPath};
+		if(isEncryption){
+			args =new String[] {"d","-f",jarPath,"--only-main-classes"};
+		}
 		try {
 			for (String arg : args) {
 				System.out.print(arg+" ");