diff --git a/app/src/main/java/keijumt/devandroid/common/Task.kt b/app/src/main/java/keijumt/devandroid/common/Task.kt
index e2fdf8a..782715e 100644
--- a/app/src/main/java/keijumt/devandroid/common/Task.kt
+++ b/app/src/main/java/keijumt/devandroid/common/Task.kt
@@ -34,13 +34,11 @@
 
     private class SquareTask(val callback: Callback<Int>, val countDownLatch: CountDownLatch) : AsyncTask<Int, Void, Int>() {
         override fun doInBackground(vararg params: Int?): Int {
-            println("doInBackground, param is ${params.get(0)}")
             val value = params.get(0)!!
             return value * value
         }
 
         override fun onPostExecute(result: Int?) {
-            println("onPostExecute, result is ${result}")
             callback.execute(result!!)
             countDownLatch.countDown()
         }