diff --git a/README.md b/README.md
index 4c344d0..0d0bbf0 100644
--- a/README.md
+++ b/README.md
@@ -98,6 +98,8 @@ new Snidel([
     'logger' => $monolog,
     // Please refer to `Using custom queue`
     'driver' => $driver,
+    // a polling duration(in seconds) of queueing
+    'pollingDuration' => 1,
 ]);
 ```
 
diff --git a/src/Snidel.php b/src/Snidel.php
index e25adc3..75673fd 100644
--- a/src/Snidel.php
+++ b/src/Snidel.php
@@ -1,5 +1,5 @@
 <?php
-declare(ticks = 1);
+declare(ticks=1);
 
 namespace Ackintosh;
 
diff --git a/src/Snidel/Config.php b/src/Snidel/Config.php
index 278e357..e0c42e9 100644
--- a/src/Snidel/Config.php
+++ b/src/Snidel/Config.php
@@ -17,6 +17,8 @@ public function __construct($params = [])
             'concurrency'   => 5,
             'logger'        => null,
             'driver' => null,
+            // a polling duration(in seconds) of queueing
+            'pollingDuration' => 1,
         ];
 
         $this->params = array_merge($default, $params);
diff --git a/src/Snidel/Fork/Container.php b/src/Snidel/Fork/Container.php
index 92c17ca..27e5de0 100644
--- a/src/Snidel/Fork/Container.php
+++ b/src/Snidel/Fork/Container.php
@@ -1,5 +1,5 @@
 <?php
-declare(ticks = 1);
+declare(ticks=1);
 namespace Ackintosh\Snidel\Fork;
 
 use Ackintosh\Snidel\ActiveWorkerSet;
@@ -186,7 +186,7 @@ private function forkWorker()
             throw new \RuntimeException($message);
         }
 
-        $worker = new Worker($process, $this->config->get('driver'));
+        $worker = new Worker($process, $this->config->get('driver'), $this->config->get('pollingDuration'));
 
         if (getmypid() === $this->master->getPid()) {
             // master
@@ -267,7 +267,7 @@ public function results()
     {
         for (; $this->queuedCount() > $this->dequeuedCount();) {
             for (;;) {
-                if ($envelope = $this->resultQueue->dequeue()) {
+                if ($envelope = $this->resultQueue->dequeue($this->config->get('pollingDuration'))) {
                     $this->dequeuedCount++;
                     break;
                 }
diff --git a/src/Snidel/Worker.php b/src/Snidel/Worker.php
index 2568ca7..0a11070 100644
--- a/src/Snidel/Worker.php
+++ b/src/Snidel/Worker.php
@@ -1,10 +1,10 @@
 <?php
+declare(ticks=1);
 namespace Ackintosh\Snidel;
 
 use Ackintosh\Snidel\Result\Result;
 use Ackintosh\Snidel\Task\Task;
 use Ackintosh\Snidel\Traits\Queueing;
-use Bernard\Router\SimpleRouter;
 
 class Worker
 {
@@ -25,26 +25,39 @@ class Worker
     /** @var \Bernard\QueueFactory\PersistentFactory */
     private $factory;
 
-    /** @var \Bernard\Consumer */
-    private $consumer;
-
     /** @var \Bernard\Producer */
     private $producer;
 
+    /** @var \Bernard\Queue  */
+    private $taskQueue;
+
+    /** @var int */
+    private $pollingDuration;
+
     /**
      * @param \Ackintosh\Snidel\Fork\Process $process
      * @param \Bernard\Driver $driver
+     * @param int $pollingDuration
      */
-    public function __construct($process, $driver)
+    public function __construct($process, $driver, $pollingDuration)
     {
         $this->pcntl = new Pcntl();
         $this->process = $process;
 
         $this->factory = $this->createFactory($driver);
-        $router = new SimpleRouter();
-        $router->add('Task', $this);
-        $this->consumer = $this->createConsumer($router);
         $this->producer = $this->createProducer($this->factory);
+
+        /*
+         * Flat-file driver may causes E_WARNING (mkdir(): File exists) in race condition.
+         * Suppress the warning as it isn't matter and we should progress this task.
+         */
+        if ($driver instanceof \Bernard\Driver\FlatFileDriver) {
+            $this->taskQueue = @$this->factory->create('task');
+        } else {
+            $this->taskQueue = $this->factory->create('task');
+        }
+
+        $this->pollingDuration = $pollingDuration;
     }
 
     /**
@@ -62,7 +75,15 @@ public function getPid()
      */
     public function run()
     {
-        $this->consumer->consume($this->factory->create('task'));
+        while (true) {
+            if ($envelope = $this->taskQueue->dequeue($this->pollingDuration)) {
+                $this->task($envelope->getMessage());
+            }
+            // We need to insert some statements here as condition expressions are not tickable.
+            // Worker process can't receive signals sent from Master if there's no statements here.
+            // @see http://jp2.php.net/manual/en/control-structures.declare.php#control-structures.declare.ticks
+            usleep(1);
+        }
     }
 
     /**
diff --git a/tests/Snidel/ActiveWorkerSetTest.php b/tests/Snidel/ActiveWorkerSetTest.php
index 4a7db80..ddc5047 100644
--- a/tests/Snidel/ActiveWorkerSetTest.php
+++ b/tests/Snidel/ActiveWorkerSetTest.php
@@ -70,7 +70,7 @@ public function terminate()
     {
         $driver = (new Config())->get('driver');
         $worker1 = $this->getMockBuilder('\Ackintosh\Snidel\Worker')
-            ->setConstructorArgs([$this->makeProcess(1), $driver])
+            ->setConstructorArgs([$this->makeProcess(1), $driver, 1])
             ->setMethods(['terminate'])
             ->getMock();
         $worker1->expects($this->once())
@@ -78,7 +78,7 @@ public function terminate()
             ->with(SIGTERM);
 
         $worker2 = $this->getMockBuilder('\Ackintosh\Snidel\Worker')
-            ->setConstructorArgs([$this->makeProcess(2), $driver])
+            ->setConstructorArgs([$this->makeProcess(2), $driver, 1])
             ->setMethods(['terminate'])
             ->getMock();
         $worker2->expects($this->once())
diff --git a/tests/Snidel/SnidelTest.php b/tests/Snidel/SnidelTest.php
index ca80ebe..6481b54 100644
--- a/tests/Snidel/SnidelTest.php
+++ b/tests/Snidel/SnidelTest.php
@@ -65,7 +65,11 @@ public function passMultipleArguments()
      */
     public function concurrency()
     {
-        $snidel = new Snidel(['concurrency' => 3]);
+        $snidel = new Snidel([
+            'concurrency' => 3,
+            // in order to minify the delay time due to the issue of bernard's polling, specifying a small number.
+            'pollingDuration' => 0.5,
+        ]);
 
         $start = time();
         $snidel->process('sleepsTwoSeconds');
diff --git a/tests/TestCase.php b/tests/TestCase.php
index dfacd59..2561a80 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -61,7 +61,8 @@ protected function makeWorker($pid = null)
 
         return new Worker(
             new Process($pid),
-            (new Config())->get('driver')
+            (new Config())->get('driver'),
+            (new Config())->get('pollingDuration')
         );
     }
 }