diff --git a/CHANGELOG-ZH.md b/CHANGELOG-ZH.md
index 3d664d2b..3e12fd80 100644
--- a/CHANGELOG-ZH.md
+++ b/CHANGELOG-ZH.md
@@ -2,6 +2,31 @@
 
 > [ Change log in english](https://github.com/lingochamp/FileDownloader/blob/master/CHANGELOG.md)
 
+## Version 0.3.4
+
+_2016-07-31_
+
+#### 新接口
+
+- 添加 `FileDownloader#clear`: 用于强制根据任务ID清理其在filedownloader中的数据。Closes #218
+
+#### 性能与提高
+
+- 提高实用性: 为 `FileDownloader#start(FileDownloader, boolean)` 添加返回值: 是否成功启动任务下载。Closes #215
+- 提高实用性: `FileDownloader#pause` 暂停任务时，不再仅仅是暂停一个任务，而是暂停掉所有ID为指定ID的运行中的任务。
+
+#### 修复
+
+- 修复(初始化-CRASH): 修复初始化FileDownloader时，从`ActivityManager`获取到运行中进程信息为空时发生CRASH。Closes #210
+- 修复(小概率-CRASH): 修复当FileDownloadService已经`onDestroy`后，还接收到`snapshot-message`时发生CRASH的情况。 Closes #213
+- 修复(消息流准确性): 在真正启动下载时删除目标文件，以此保证当有相同任务正在下载时，获取下载状态，不会获取到已经下载完成的错误的状态。Closes #220
+- 修复(启动线性下载): 收集未绑定的任务进行启动而非只是根据FileDownloadListener去收集任务，修复无法启动两个相同`FileDownloadListener`的队列。Closes #233
+- 修复(清理Messenger): 在回调 结束的消息 的回调之前进行清理任务的Messenger，而非在回调之后清理，以此确保在回调方法中可以调用`BaseDownloadTask#reuse`。Closes #229
+
+#### 其他
+
+- 所依赖的okhttp从`3.3.1`升到`3.4.1`。
+
 ## Version 0.3.3
 
 _2016-07-10_
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 453ef2e0..b29a16e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,32 @@
 
 > [中文迭代日志](https://github.com/lingochamp/FileDownloader/blob/master/CHANGELOG-ZH.md)
 
+## Version 0.3.4
+
+_2016-07-31_
+
+#### New Interfaces
+
+- Add `FileDownloader#clear`: clear the data with the task id in the filedownloader database. Closes #218.
+
+#### Enhancement
+
+- Improve Practicability: Add return value to the method `FileDownloader#start(FileDownloadListener, boolean)` : Whether start tasks successfully. Closes #215.
+- Improve Practicability: Pause tasks with the same download-id rather than just pause one task through there are more than one task in downloading.
+
+#### Fix
+
+- Fix(init-crash): Fix the crash about the list of running-app-process-info from `ActivityManager` is null when to init FileDownloader. Closes #210.
+- Fix(minor-crash): Fix the NPE-crash when to execute receiving snapshot-message after FileDownloadService already onDestroy. Closes #213.
+- Fix(message-keep-flow): Delete the target file before start downloading, ensure can't get the `completed` status when another same task is downloading. Closes #220
+- Fix(start-serial): Assemble non-attached-tasks to start rather than assemble tasks just refer to FileDownloadListener, fix no possibility to start two queues with the same `FileDownloadListener`. Closes #223.
+- Fix(free-messenger): Free the messenger of Task before call back 'over-message' to FileDownloadListener instead of after callback, ensure Task can be reused in FileDownloadListener callback method. Closes #229.
+
+#### Others
+
+- Upgrade dependency okhttp from `3.3.1` to `3.4.1`.
+
+
 ## Version 0.3.3
 
 _2016-07-10_
diff --git a/README-zh.md b/README-zh.md
index a3873437..cbd26d00 100644
--- a/README-zh.md
+++ b/README-zh.md
@@ -8,12 +8,14 @@ Android 文件下载引擎，稳定、高效、简单易用
 
 > [README DOC](https://github.com/lingochamp/FileDownloader/blob/master/README.md)
 
-> 本引擎依赖okhttp 3.3.1
+> 本引擎依赖okhttp 3.4.1
 
 ---
+
 #### 版本迭代日志: [Change Log](https://github.com/lingochamp/FileDownloader/blob/master/CHANGELOG.md)
 
 #### 英文文档: [Wiki](https://github.com/lingochamp/FileDownloader/wiki)
+
 ---
 
 ### 特点
@@ -61,7 +63,7 @@ Android 文件下载引擎，稳定、高效、简单易用
 在项目中引用:
 
 ```
-compile 'com.liulishuo.filedownloader:library:0.3.3'
+compile 'com.liulishuo.filedownloader:library:0.3.4'
 ```
 
 > 如果是eclipse引入jar包参考: [这里](https://github.com/lingochamp/FileDownloader/issues/212#issuecomment-232240415)
@@ -241,6 +243,7 @@ if (parallel) {
 | pause(listener:FileDownloadListener) | 暂停启动相同监听器的任务
 | pauseAll(void) | 暂停所有任务
 | pause(downloadId) | 暂停downloadId的任务
+| clear(downloadId, targetFilePath) | 强制清理ID为downloadId的任务在filedownloader中的数据
 | getSoFar(downloadId) | 获得下载Id为downloadId的soFarBytes
 | getTotal(downloadId) | 获得下载Id为downloadId的totalBytes
 | bindService(void) | 主动启动下载进程(可事先调用该方法(可以不调用)，保证第一次下载的时候没有启动进程的速度消耗)
diff --git a/README.md b/README.md
index 79919027..fae26e1e 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Android multi-task file download engine.
 
 > [中文文档](https://github.com/lingochamp/FileDownloader/blob/master/README-zh.md)
 
-> This project dependency on [square/okhttp 3.3.1](https://github.com/square/okhttp)
+> This project dependency on [square/okhttp 3.4.1](https://github.com/square/okhttp)
 
 ## DEMO
 
@@ -26,7 +26,7 @@ FileDownloader is installed by adding the following dependency to your build.gra
 
 ```
 dependencies {
-    compile 'com.liulishuo.filedownloader:library:0.3.3'
+    compile 'com.liulishuo.filedownloader:library:0.3.4'
 }
 ```
 
diff --git a/gradle.properties b/gradle.properties
index b00062d6..005434c3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
-VERSION_NAME=0.3.3
-VERSION_CODE=24
+VERSION_NAME=0.3.4
+VERSION_CODE=25
 BUILD_TOOLS_VERSION=23.0.1
 COMPILE_SDK_VERSION=23