diff --git a/Cargo.lock b/Cargo.lock
index 39d8cfb..e412145 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -224,7 +224,7 @@ dependencies = [
 
 [[package]]
 name = "max-mic-volume"
-version = "0.2.1"
+version = "0.2.2"
 dependencies = [
  "anyhow",
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index f1ae3b6..17f6644 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "max-mic-volume"
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 license = "MIT"
 description = "A simple CLI tool to set the microphone volume to the maximum in MacOS"
diff --git a/README.md b/README.md
index 1b5608f..d4aad43 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,21 @@ However, it does not maximize when muted.
 
 ![behavior](images/behavior.png)
 
+## Usage
+
+```bash
+$ ./max-mic-volume --help
+A simple CLI tool to set the microphone volume to the maximum in MacOS
+
+Usage: max-mic-volume [OPTIONS]
+
+Options:
+  -p, --polling-interval-ms <POLLING_INTERVAL_MS>  [default: 3000]
+  -h, --help                                       Print help
+  -V, --version                                    Print version
+
+```
+
 ## Setup as CLI tool
 
 <https://github.com/amiyzku/max-mic-volume/releases>