diff --git a/main.go b/main.go
index 21c7fed..4552f75 100644
--- a/main.go
+++ b/main.go
@@ -40,8 +40,10 @@ type RealSleeper struct {
 }
 
 func (self RealSleeper) Sleep(ch chan<- interface{}) {
-	time.Sleep(self.duration)
-	ch <- nil
+	go func() {
+		time.Sleep(self.duration)
+		ch <- nil
+	}()
 }
 
 func getCmdLineParams(logger *log.Logger) (string, []int64) {