diff --git a/src/main/scala/org/learningconcurrency/ch3/Executors.scala b/src/main/scala/org/learningconcurrency/ch3/Executors.scala
index f8c0a80..e3433e6 100644
--- a/src/main/scala/org/learningconcurrency/ch3/Executors.scala
+++ b/src/main/scala/org/learningconcurrency/ch3/Executors.scala
@@ -12,6 +12,8 @@ object ExecutorsCreate extends App {
   executor.execute(new Runnable {
     def run() = log("This task is run asynchronously.")
   })
+
+  Thread.sleep(500)
 }