diff --git a/README.md b/README.md
index 89b5f7d6..8070e0a6 100644
--- a/README.md
+++ b/README.md
@@ -2,18 +2,29 @@
 
 由 Shadowsocks Android 客户端修改而来，支持 [SSRoT 协议](https://github.com/ShadowsocksR-Live/shadowsocksr-native/wiki)。
 
+支持 [overtls](https://github.com/ShadowsocksR-Live/overtls), 一個新代理，相當於去掉 SSR 和 SS, 唯獨保留 OT 的 Rust 實現，速度飛快，穩如老狗。
+
 [常见问题](FAQ.md)
 
 ### 编译
 
+#### 工具準備
+
 * [Git](https://git-scm.com/downloads)
 * [OpenJDK 11+](https://jdk.java.net/)
 * [Android SDK](https://developer.android.com/studio#command-tools)
   - Android SDK Build-Tools 31.0.0
-  - Android SDK Platform 31
-  - NDK (Side by side) 21.4.7075529
+  - Android SDK Platform 33
+  - NDK (Side by side) 25.1.8937393
   - Android SDK Tools
 
+* [Rust](https://rust-lang.org/)
+  - Install rust on your PC from [rustup](https://rustup.rs/)
+  - Some Android targets (arm64, arm, x86_64, x86) for rust.
+    ```bash
+    rustup target add aarch64-linux-android armv7-linux-androideabi i686-linux-android x86_64-linux-android
+    ```
+
 #### 獲取源碼
 
 ```shell script
diff --git a/build.gradle b/build.gradle
index 01801167..173e760f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,8 +6,8 @@ ext {
     sdkVersion = 33
     compileSdkVersion = 33
     buildToolsVersion = '31.0.0'
-    versionCode = 517
-    versionName = '5.1.7'
+    versionCode = 518
+    versionName = '5.1.8'
     resConfigs = ['zh-rCN']
 }