diff --git a/README.md b/README.md
new file mode 100644
index 0000000..00c5552
--- /dev/null
+++ b/README.md
@@ -0,0 +1,14 @@
+# matrix-dump
+
+Matrix Protocol Dumper
+
+## Usage
+
+Sample command:
+
+```sh
+mkdir -p config
+
+cargo run --release -- --username @eternal_flame:matrix.org -f alikia
+```
+
diff --git a/src/lib.rs b/src/lib.rs
index ccf6c12..cf21f5c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -43,7 +43,10 @@ pub struct Args {
     #[clap(long, default_value = "Matrix.org Protocol Dumper by Yumechi")]
     pub device_name: Option<String>,
 
-    #[clap(long)]
+    #[clap(
+        long,
+        help = "If you lost the token but still have the keys, specify the device ID here"
+    )]
     pub device_id: Option<String>,
 
     #[clap(long, default_value = "config/token.json")]
@@ -52,7 +55,7 @@ pub struct Args {
     #[clap(short, long, default_value = "dump")]
     pub out_dir: String,
 
-    #[clap(long)]
+    #[clap(short, long, help = "Filter rooms by name or ID by substring")]
     pub filter: Vec<String>,
 
     #[clap(long, short = 'j', default_value = "4")]
@@ -61,7 +64,7 @@ pub struct Args {
     #[clap(long, default_value = "config/e2e.db")]
     pub e2e_db: String,
 
-    #[clap(long)]
+    #[clap(long, help = "Read the password from a file")]
     pub password_file: Option<String>,
 
     #[clap(