diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java b/webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java
index fff7c7c..24889c8 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/downloader/HttpClientDownloader.java
@@ -2,7 +2,6 @@ package us.codecraft.webmagic.downloader;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.http.HttpResponse;
-import org.apache.http.annotation.ThreadSafe;
 import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.util.EntityUtils;
@@ -30,7 +29,6 @@ import java.util.Map;
  * @author code4crafter@gmail.com <br>
  * @since 0.1.0
  */
-@ThreadSafe
 public class HttpClientDownloader extends AbstractDownloader {
 
     private Logger logger = LoggerFactory.getLogger(getClass());
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java b/webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java
index 57d6eea..be9fd7c 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/pipeline/FilePipeline.java
@@ -1,10 +1,8 @@
 package us.codecraft.webmagic.pipeline;
 
 import org.apache.commons.codec.digest.DigestUtils;
-import org.apache.http.annotation.ThreadSafe;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-
 import us.codecraft.webmagic.ResultItems;
 import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.utils.FilePersistentBase;
@@ -21,7 +19,6 @@ import java.util.Map;
  * @author code4crafter@gmail.com <br>
  * @since 0.1.0
  */
-@ThreadSafe
 public class FilePipeline extends FilePersistentBase implements Pipeline {
 
     private Logger logger = LoggerFactory.getLogger(getClass());
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/PriorityScheduler.java b/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/PriorityScheduler.java
index 8fa1b9e..14cbaff 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/PriorityScheduler.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/PriorityScheduler.java
@@ -1,6 +1,5 @@
 package us.codecraft.webmagic.scheduler;
 
-import org.apache.http.annotation.ThreadSafe;
 import us.codecraft.webmagic.Request;
 import us.codecraft.webmagic.Task;
 import us.codecraft.webmagic.utils.NumberUtils;
@@ -16,7 +15,6 @@ import java.util.concurrent.PriorityBlockingQueue;
  * @author code4crafter@gmail.com <br>
  * @since 0.2.1
  */
-@ThreadSafe
 public class PriorityScheduler extends DuplicateRemovedScheduler implements MonitorableScheduler {
 
     public static final int INITIAL_CAPACITY = 5;
diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/QueueScheduler.java b/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/QueueScheduler.java
index 078506c..f9ad0e9 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/QueueScheduler.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/scheduler/QueueScheduler.java
@@ -1,6 +1,5 @@
 package us.codecraft.webmagic.scheduler;
 
-import org.apache.http.annotation.ThreadSafe;
 import us.codecraft.webmagic.Request;
 import us.codecraft.webmagic.Task;
 
@@ -15,7 +14,6 @@ import java.util.concurrent.LinkedBlockingQueue;
  * @author code4crafter@gmail.com <br>
  * @since 0.1.0
  */
-@ThreadSafe
 public class QueueScheduler extends DuplicateRemovedScheduler implements MonitorableScheduler {
 
     private BlockingQueue<Request> queue = new LinkedBlockingQueue<Request>();
diff --git a/webmagic-extension/src/main/java/us/codecraft/webmagic/downloader/PhantomJSDownloader.java b/webmagic-extension/src/main/java/us/codecraft/webmagic/downloader/PhantomJSDownloader.java
index 0fda351..6055bdb 100644
--- a/webmagic-extension/src/main/java/us/codecraft/webmagic/downloader/PhantomJSDownloader.java
+++ b/webmagic-extension/src/main/java/us/codecraft/webmagic/downloader/PhantomJSDownloader.java
@@ -1,6 +1,5 @@
 package us.codecraft.webmagic.downloader;
 
-import org.apache.http.annotation.ThreadSafe;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import us.codecraft.webmagic.Page;
@@ -16,7 +15,6 @@ import java.io.*;
  * @author dolphineor@gmail.com
  * @version 0.5.3
  */
-@ThreadSafe
 public class PhantomJSDownloader extends AbstractDownloader {
 
     private static Logger logger = LoggerFactory.getLogger(PhantomJSDownloader.class);