diff --git a/Cargo.toml b/Cargo.toml
index 828af9e..b063dbe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,7 @@ futures-util = { version = "0.3", default-features = false, features = [
 http = "1.0"
 httparse = "1.8"
 lazy_static = "1.4"
-log = "0.4"
+log = { version = "0.4", features = ["std"] }
 moka = { version = "0.12", features = ["future"] }
 reqwest = { version = "0.11", default-features = false, features = [
     "rustls-tls",
diff --git a/apple/readme.md b/apple/readme.md
new file mode 100644
index 0000000..58db657
--- /dev/null
+++ b/apple/readme.md
@@ -0,0 +1,19 @@
+## Building iOS framework
+
+### Install **Rust** build tools
+- Install Xcode Command Line Tools: `xcode-select --install`
+- Install Rust programming language: `curl https://sh.rustup.rs -sSf | sh`
+- Install iOS target support: `rustup target add aarch64-apple-ios aarch64-apple-ios-sim x86_64-apple-ios`
+- Install `cbindgen` tool: `cargo install cbindgen`
+
+### Building iOS framework
+Due to an unknown reason at present, compiling Rust code from Xcode fails, so you have to manually compile it.
+Please run the following command in zsh (or bash):
+```bash
+cd overtls
+
+cargo build --release --target aarch64-apple-ios
+cargo build --release --target x86_64-apple-ios
+lipo -create target/aarch64-apple-ios/release/libovertls.a target/x86_64-apple-ios/release/libovertls.a -output target/libovertls.a
+cbindgen --config cbindgen.toml -l C -o target/overtls-ios.h
+```
diff --git a/readme.md b/readme.md
index b7b82ad..30a0d5c 100644
--- a/readme.md
+++ b/readme.md
@@ -109,24 +109,3 @@ Note the `tunnel_path` configuration, please make sure to change it to your own
 >    For testing purposes, the `disable_tls` option is provided to have the ability to disable `TLS`; that is, if this option exists and is true, the software will transmit traffic in `plain text`; for security reasons, please do not use it on official occasions.
 
 This example shows the configuration file of the least entry, the complete configuration file can refer to [config.json](config.json).
-
-
-## Building iOS framework
-
-### Install **Rust** build tools
-- Install Xcode Command Line Tools: `xcode-select --install`
-- Install Rust programming language: `curl https://sh.rustup.rs -sSf | sh`
-- Install iOS target support: `rustup target add aarch64-apple-ios aarch64-apple-ios-sim x86_64-apple-ios`
-- Install `cbindgen` tool: `cargo install cbindgen`
-
-### Building iOS framework
-Due to an unknown reason at present, compiling Rust code from Xcode fails, so you have to manually compile it.
-Please run the following command in zsh (or bash):
-```
-cd overtls
-
-cargo build --release --target aarch64-apple-ios
-cargo build --release --target x86_64-apple-ios
-lipo -create target/aarch64-apple-ios/release/libovertls.a target/x86_64-apple-ios/release/libovertls.a -output target/libovertls.a
-cbindgen --config cbindgen.toml -l C -o target/overtls-ios.h
-```