diff --git a/UPGRADE-3.4.md b/UPGRADE-3.4.md
index 0e1e966d6660d..5a7aaf420f524 100644
--- a/UPGRADE-3.4.md
+++ b/UPGRADE-3.4.md
@@ -1,6 +1,11 @@
 UPGRADE FROM 3.3 to 3.4
 =======================
 
+Console
+-------
+
+  * Default validation in `SymfonyQuestionHelper::ask` has been deprecated and will be removed in 4.0. Apply validation using `Question::setValidator` instead.
+
 DependencyInjection
 -------------------
 
diff --git a/UPGRADE-4.0.md b/UPGRADE-4.0.md
index 1a7a2542376ca..f823c774b595d 100644
--- a/UPGRADE-4.0.md
+++ b/UPGRADE-4.0.md
@@ -61,6 +61,8 @@ Console
  * The `console.exception` event and the related `ConsoleExceptionEvent` class have
    been removed in favor of the `console.error` event and the `ConsoleErrorEvent` class.
 
+ * Default validation in `SymfonyQuestionHelper::ask` has been removed in favor of `Question::setValidator`.
+
 Debug
 -----
 
diff --git a/src/Symfony/Bundle/WebServerBundle/Command/ServerStartCommand.php b/src/Symfony/Bundle/WebServerBundle/Command/ServerStartCommand.php
index 57de788608547..af90a53f32c99 100644
--- a/src/Symfony/Bundle/WebServerBundle/Command/ServerStartCommand.php
+++ b/src/Symfony/Bundle/WebServerBundle/Command/ServerStartCommand.php
@@ -93,7 +93,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                 'You can either install it or use the "server:run" command instead.',
             ));
 
-            if ($io->ask('Do you want to execute <info>server:run</info> immediately? [yN] ', false)) {
+            if ($io->confirm('Do you want to execute <info>server:run</info> immediately?', false)) {
                 return $this->getApplication()->find('server:run')->run($input, $output);
             }
 
diff --git a/src/Symfony/Component/Console/CHANGELOG.md b/src/Symfony/Component/Console/CHANGELOG.md
index b337ecf992f4d..616f70e137c0c 100644
--- a/src/Symfony/Component/Console/CHANGELOG.md
+++ b/src/Symfony/Component/Console/CHANGELOG.md
@@ -18,6 +18,7 @@ CHANGELOG
 * deprecated console.exception event in favor of console.error
 * added ability to handle `CommandNotFoundException` through the 
  `console.error` event
+* deprecated default validation in `SymfonyQuestionHelper::ask`
 
 3.2.0
 ------
diff --git a/src/Symfony/Component/Console/Helper/SymfonyQuestionHelper.php b/src/Symfony/Component/Console/Helper/SymfonyQuestionHelper.php
index 25e094a04f45c..aa2701311d8e7 100644
--- a/src/Symfony/Component/Console/Helper/SymfonyQuestionHelper.php
+++ b/src/Symfony/Component/Console/Helper/SymfonyQuestionHelper.php
@@ -29,6 +29,8 @@ class SymfonyQuestionHelper extends QuestionHelper
 {
     /**
      * {@inheritdoc}
+     *
+     * BC to be removed in 4.0
      */
     public function ask(InputInterface $input, OutputInterface $output, Question $question)
     {
@@ -39,6 +41,8 @@ public function ask(InputInterface $input, OutputInterface $output, Question $qu
             } else {
                 // make required
                 if (!is_array($value) && !is_bool($value) && 0 === strlen($value)) {
+                    @trigger_error('The default question validator is deprecated since Symfony 3.4 and will not be used anymore in version 4.0. Set a custom question validator instead.', E_USER_DEPRECATED);
+
                     throw new LogicException('A value is required.');
                 }
             }
diff --git a/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
index ce946e5b6259e..d07c30e25d921 100644
--- a/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
@@ -120,6 +120,18 @@ public function testAskThrowsExceptionOnMissingInput()
         $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream('')), $this->createOutputInterface(), new Question('What\'s your name?'));
     }
 
+    /**
+     * @group legacy
+     * @expectedException \Symfony\Component\Console\Exception\RuntimeException
+     * @expectedExceptionMessage Aborted
+     * @expectedDeprecation The default question validator is deprecated since Symfony 3.4 and will not be used anymore in version 4.0. Set a custom question validator instead.
+     */
+    public function testLegacyAsk()
+    {
+        $dialog = new SymfonyQuestionHelper();
+        $dialog->ask($this->createStreamableInputInterfaceMock($this->getInputStream(' ')), $this->createOutputInterface(), new Question('Question'));
+    }
+
     protected function getInputStream($input)
     {
         $stream = fopen('php://memory', 'r+', false);