diff --git a/Cargo.toml b/Cargo.toml
index 9e6f33c..45e107b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ openssl = ["domain/openssl"]
 ring    = ["domain/ring"]
 
 [dependencies]
-clap = { version = "4", features = ["derive"] }
+clap = { version = "4", features = ["cargo", "derive"] }
 domain = { git = "http://github.com/NLnetLabs/domain", branch = "main", features = ["unstable-sign"] }
 lexopt = "0.3.0"
 
diff --git a/src/commands/keygen.rs b/src/commands/keygen.rs
index 4c72a97..b2d873b 100644
--- a/src/commands/keygen.rs
+++ b/src/commands/keygen.rs
@@ -108,7 +108,14 @@ impl LdnsCommand for Keygen {
                     force_symlinks = true;
                 }
 
-                // TODO: '-v' version argument?
+                Arg::Short('v') => {
+                    let version = clap::crate_version!();
+                    // NOTE: The outer version is the latest version of 'ldns-keygen' we are
+                    // compatible with.  This needs to be updated manually.
+                    println!("DNSSEC key generator version 1.8.4 (dnst version {version})");
+                    std::process::exit(0);
+                }
+
                 Arg::Value(value) => {
                     if name.is_some() {
                         return Err("cannot specify multiple domain names".into());