diff --git a/sdk/CHANGELOG b/sdk/CHANGELOG
index ec15bce..e2d614a 100644
--- a/sdk/CHANGELOG
+++ b/sdk/CHANGELOG
@@ -1,3 +1,10 @@
+SDK更新日志
+
+v4.9
+1.修复了HTTP Basic代理返回不合适的头部,导致浏览器不会弹框,个别代理插件无法认证的问题.
+2.内网穿透切换smux到yamux.
+3.优化了HTTP(S)\SOCKS5代理--always的处理逻辑.
+
 v4.8
 1.修复了多个服务同时开启日志,只会输出到最后一个日志文件的bug.  
 2.增加了获取sdk版本的Version()方法.  
diff --git a/sdk/android-ios/release_android.sh b/sdk/android-ios/release_android.sh
index 9906fd3..d2af849 100755
--- a/sdk/android-ios/release_android.sh
+++ b/sdk/android-ios/release_android.sh
@@ -1,5 +1,5 @@
 #/bin/bash
-VER="v4.8"
+VER="v4.9"
 rm -rf sdk-android-*.tar.gz
 rm -rf android
 mkdir android
diff --git a/sdk/android-ios/release_ios.sh b/sdk/android-ios/release_ios.sh
index e3062bb..23062f3 100755
--- a/sdk/android-ios/release_ios.sh
+++ b/sdk/android-ios/release_ios.sh
@@ -1,5 +1,5 @@
 #/bin/bash
-VER="v4.8"
+VER="v4.9"
 rm -rf sdk-ios-*.tar.gz
 rm -rf ios
 mkdir ios
diff --git a/sdk/windows-linux/release_linux.sh b/sdk/windows-linux/release_linux.sh
index a35acf8..0ca404f 100755
--- a/sdk/windows-linux/release_linux.sh
+++ b/sdk/windows-linux/release_linux.sh
@@ -1,5 +1,5 @@
 #/bin/bash
-VER="v4.8"
+VER="v4.9"
 
 rm -rf sdk-linux-*.tar.gz
 rm -rf README.md libproxy-sdk.so libproxy-sdk.h libproxy-sdk.a
diff --git a/sdk/windows-linux/release_mac.sh b/sdk/windows-linux/release_mac.sh
index 7d89858..af3f974 100755
--- a/sdk/windows-linux/release_mac.sh
+++ b/sdk/windows-linux/release_mac.sh
@@ -1,5 +1,5 @@
 #/bin/bash
-VER="v4.8"
+VER="v4.9"
 
 rm -rf *.tar.gz
 rm -rf README.md libproxy-sdk.dylib libproxy-sdk.h
diff --git a/sdk/windows-linux/release_windows.sh b/sdk/windows-linux/release_windows.sh
index ebe639d..64ab452 100755
--- a/sdk/windows-linux/release_windows.sh
+++ b/sdk/windows-linux/release_windows.sh
@@ -1,5 +1,5 @@
 #/bin/bash
-VER="v4.8"
+VER="v4.9"
 
 sudo rm /usr/local/go
 sudo ln -s /usr/local/go1.10.1 /usr/local/go