diff --git a/src/main/java/org/fogbowcloud/ssh/TunnelServer.java b/src/main/java/org/fogbowcloud/ssh/TunnelServer.java
index d609575..7f4fa6f 100644
--- a/src/main/java/org/fogbowcloud/ssh/TunnelServer.java
+++ b/src/main/java/org/fogbowcloud/ssh/TunnelServer.java
@@ -158,6 +158,7 @@ public String getName() {
 		sshServer.setUserAuthFactories(userAuthenticators);
 		sshServer.setHost(sshTunnelHost == null ? "0.0.0.0" : sshTunnelHost);
 		sshServer.setPort(sshTunnelPort);
+		sshServer.setNioWorkers(7);
 		executor.scheduleWithFixedDelay(new Runnable() {
 			@Override
 			public void run() {