diff --git a/Cargo.toml b/Cargo.toml
index 9a23e25..2938378 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,6 @@
 [package]
 name = "dip"
+description = "Configurable webhook server."
 version = "0.1.0"
 authors = ["Michael Zhang <failed.down@gmail.com>"]
 
diff --git a/src/main.rs b/src/main.rs
index 7349407..8e4f95a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -10,8 +10,12 @@ use structopt::StructOpt;
 
 #[derive(Debug, StructOpt)]
 struct Opt {
+    /// The root configuration directory for dip.
     #[structopt(short = "d", long = "root", parse(from_os_str))]
     root: PathBuf,
+    /// A string containing the address to bind to.
+    #[structopt(short = "b", long = "bind")]
+    bind: Option<String>,
 }
 
 fn main() -> Result<(), Error> {