diff --git a/src/main/java/com/realtimetech/reflection/classloader/ClassDynamicLoader.java b/src/main/java/com/realtimetech/reflection/classloader/ClassDynamicLoader.java
index c285687..b89f412 100644
--- a/src/main/java/com/realtimetech/reflection/classloader/ClassDynamicLoader.java
+++ b/src/main/java/com/realtimetech/reflection/classloader/ClassDynamicLoader.java
@@ -1,10 +1,12 @@
 package com.realtimetech.reflection.classloader;
 
+import java.net.URL;
+import java.net.URLClassLoader;
 import java.util.HashMap;
 
 import com.realtimetech.reflection.classfile.file.ClassFile;
 
-public class ClassDynamicLoader extends ClassLoader {
+public class ClassDynamicLoader extends URLClassLoader {
 	private HashMap<String, byte[]> classMap;
 
 	public ClassDynamicLoader() {
@@ -12,10 +14,14 @@ public ClassDynamicLoader() {
 	}
 
 	public ClassDynamicLoader(ClassLoader classLoader) {
-		super(classLoader);
+		super(new URL[0], classLoader);
 		this.classMap = new HashMap<String, byte[]>();
 	}
 
+	public void addURL(URL url) {
+		super.addURL(url);
+	}
+	
 	public void addClass(String className, byte[] bytes) {
 		this.classMap.put(className, bytes);
 	}