diff --git a/pom.xml b/pom.xml
index ede0210..c8d206c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -124,16 +124,6 @@
       </exclusions>
       <scope>compile</scope>
     </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-api</artifactId>
-      <version>1.6.1</version>
-    </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-log4j12</artifactId>
-      <version>1.6.1</version>
-    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
diff --git a/src/main/java/org/msgpack/rpc/Server.java b/src/main/java/org/msgpack/rpc/Server.java
index ba027d5..8113cc1 100644
--- a/src/main/java/org/msgpack/rpc/Server.java
+++ b/src/main/java/org/msgpack/rpc/Server.java
@@ -36,12 +36,12 @@
 import org.msgpack.rpc.transport.MessageSendable;
 import org.msgpack.rpc.loop.EventLoop;
 import org.msgpack.rpc.error.RPCError;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.jboss.netty.logging.InternalLogger;
+import org.jboss.netty.logging.InternalLoggerFactory;
 
 public class Server extends SessionPool {
 
-    private final static Logger logger = LoggerFactory.getLogger(Server.class);
+    private final static InternalLogger logger = InternalLoggerFactory.getInstance(Server.class);
 
     private Dispatcher dp;
     private ServerTransport stran;
diff --git a/src/main/java/org/msgpack/rpc/dispatcher/StopWatchDispatcher.java b/src/main/java/org/msgpack/rpc/dispatcher/StopWatchDispatcher.java
index 39ff87f..2b7242e 100644
--- a/src/main/java/org/msgpack/rpc/dispatcher/StopWatchDispatcher.java
+++ b/src/main/java/org/msgpack/rpc/dispatcher/StopWatchDispatcher.java
@@ -1,8 +1,8 @@
 package org.msgpack.rpc.dispatcher;
 
 import org.msgpack.rpc.Request;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.jboss.netty.logging.InternalLogger;
+import org.jboss.netty.logging.InternalLoggerFactory;
 
 /**
  * For debug.
@@ -15,7 +15,7 @@ public class StopWatchDispatcher implements Dispatcher {
 
     Dispatcher innerDispatcher;
 
-    private final static Logger logger = LoggerFactory.getLogger(StopWatchDispatcher.class);
+    private final static InternalLogger logger = InternalLoggerFactory.getInstance(StopWatchDispatcher.class);
 
     private boolean verbose = true;
 
diff --git a/src/main/java/org/msgpack/rpc/reflect/JavassistInvokerBuilder.java b/src/main/java/org/msgpack/rpc/reflect/JavassistInvokerBuilder.java
index 2a32e21..7f3dbf5 100644
--- a/src/main/java/org/msgpack/rpc/reflect/JavassistInvokerBuilder.java
+++ b/src/main/java/org/msgpack/rpc/reflect/JavassistInvokerBuilder.java
@@ -38,11 +38,11 @@
 import org.msgpack.rpc.Request;
 import org.msgpack.rpc.reflect.ReflectionInvokerBuilder.ReflectionArgumentEntry;
 import org.msgpack.template.TemplateRegistry;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.jboss.netty.logging.InternalLogger;
+import org.jboss.netty.logging.InternalLoggerFactory;
 
 public class JavassistInvokerBuilder extends InvokerBuilder {
-    private static Logger LOG = LoggerFactory.getLogger(JavassistInvokerBuilder.class);
+    private static final InternalLogger LOG = InternalLoggerFactory.getInstance(JavassistInvokerBuilder.class);
 
 
 	protected abstract static class AbstractInvoker implements Invoker {
diff --git a/src/main/java/org/msgpack/rpc/reflect/ReflectionInvokerBuilder.java b/src/main/java/org/msgpack/rpc/reflect/ReflectionInvokerBuilder.java
index 2c403f2..f6371bf 100644
--- a/src/main/java/org/msgpack/rpc/reflect/ReflectionInvokerBuilder.java
+++ b/src/main/java/org/msgpack/rpc/reflect/ReflectionInvokerBuilder.java
@@ -24,12 +24,12 @@
 import org.msgpack.rpc.*;
 import org.msgpack.type.Value;
 import org.msgpack.unpacker.Converter;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.jboss.netty.logging.InternalLogger;
+import org.jboss.netty.logging.InternalLoggerFactory;
 
 public class ReflectionInvokerBuilder extends InvokerBuilder {
 
-    private static final Logger logger = LoggerFactory.getLogger(ReflectionInvokerBuilder.class);
+    private static final InternalLogger logger = InternalLoggerFactory.getInstance(ReflectionInvokerBuilder.class);
     protected  MessagePack messagePack;
     public ReflectionInvokerBuilder(MessagePack messagePack){
         this.messagePack = messagePack;
diff --git a/src/test/java/org/msgpack/rpc/DecoratorTest.java b/src/test/java/org/msgpack/rpc/DecoratorTest.java
index c055c15..4e80a2e 100644
--- a/src/test/java/org/msgpack/rpc/DecoratorTest.java
+++ b/src/test/java/org/msgpack/rpc/DecoratorTest.java
@@ -1,7 +1,6 @@
 package org.msgpack.rpc;
 
 import junit.framework.TestCase;
-import org.apache.log4j.BasicConfigurator;
 import org.junit.Test;
 import org.msgpack.MessageTypeException;
 import org.msgpack.rpc.builder.StopWatchDispatcherBuilder;
@@ -33,7 +32,6 @@ public String throwError(String errorMessage) throws Exception{
     @Test
     public void testDecorateStopWatch()  throws Exception {
 
-        BasicConfigurator.configure();
         EventLoop loop = EventLoop.start();
         Server svr = new Server(loop);
         svr.setDispatcherBuilder(
diff --git a/src/test/java/org/msgpack/rpc/ServerErrorTest.java b/src/test/java/org/msgpack/rpc/ServerErrorTest.java
index 40a37c7..163ceec 100644
--- a/src/test/java/org/msgpack/rpc/ServerErrorTest.java
+++ b/src/test/java/org/msgpack/rpc/ServerErrorTest.java
@@ -1,7 +1,6 @@
 package org.msgpack.rpc;
 
 import junit.framework.TestCase;
-import org.apache.log4j.BasicConfigurator;
 import org.junit.Test;
 import org.msgpack.MessageTypeException;
 import org.msgpack.rpc.builder.StopWatchDispatcherBuilder;
@@ -49,7 +48,6 @@ static interface CallFunc{
 
     void call( CallFunc func)  throws Exception{
 
-        BasicConfigurator.configure();
         EventLoop loop = EventLoop.start();
         Server svr = new Server(loop);
         Client c = new Client("127.0.0.1", 19850, loop);
diff --git a/src/test/java/org/msgpack/rpc/ServerTest.java b/src/test/java/org/msgpack/rpc/ServerTest.java
index 2676d02..e2c8df4 100644
--- a/src/test/java/org/msgpack/rpc/ServerTest.java
+++ b/src/test/java/org/msgpack/rpc/ServerTest.java
@@ -17,7 +17,6 @@
 //
 package org.msgpack.rpc;
 
-import org.apache.log4j.BasicConfigurator;
 import org.msgpack.*;
 import org.msgpack.rpc.*;
 import org.msgpack.rpc.builder.StopWatchDispatcherBuilder;