diff --git a/tcp-connection.go b/tcp-connection.go
index c8a82e8..05e3a4a 100644
--- a/tcp-connection.go
+++ b/tcp-connection.go
@@ -169,7 +169,7 @@ func (c *Connection) Listen() (*GenericListener, error) {
 }
 
 const (
-	MaxCallDuration   = 300 * time.Millisecond
+	MaxCallDuration   = 900 * time.Millisecond
 	ListenerKeepalive = 5 * time.Second
 )