diff --git a/src/client.rs b/src/client.rs
index 219e9eb..3ed98e9 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -96,11 +96,12 @@ pub async fn play(
 	repeat: u32,
 	cert_path: Option<&str>,
 	skip_verif: bool,
+	concurrency: usize,
 	debug: bool,
 ) {
 	// Semaphore used to limit the number of concurrent clients.
 	// Its handle is released when the task panics.
-	let limiter = Arc::new(Semaphore::new(16));
+	let limiter = Arc::new(Semaphore::new(concurrency));
 	let counter = Arc::new(AtomicU32::new(0));
 	let running = Arc::new(Mutex::new(HashSet::new()));
 	let total = records.len() * repeat as usize;
diff --git a/src/main.rs b/src/main.rs
index b22ef53..b7b874c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -67,6 +67,9 @@ struct OptClient {
 	/// Do not verify certificates
 	#[argp(switch, short = 's')]
 	skip_verif: bool,
+	/// Maximum number of concurrent clients
+	#[argp(option, default = "16")]
+	concurrency: usize,
 	/// Print debug info
 	#[argp(switch, short = 'd')]
 	debug: bool,
@@ -150,6 +153,7 @@ async fn main() {
 				subopt.repeat,
 				subopt.certs.as_deref(),
 				subopt.skip_verif,
+				subopt.concurrency,
 				subopt.debug,
 			)
 			.await;