diff --git a/module/CLI/src/Install/Plugin/ApplicationConfigCustomizerPlugin.php b/module/CLI/src/Install/Plugin/ApplicationConfigCustomizerPlugin.php
index add69c72..232fe048 100644
--- a/module/CLI/src/Install/Plugin/ApplicationConfigCustomizerPlugin.php
+++ b/module/CLI/src/Install/Plugin/ApplicationConfigCustomizerPlugin.php
@@ -18,25 +18,23 @@ class ApplicationConfigCustomizerPlugin extends AbstractConfigCustomizerPlugin
      * @param OutputInterface $output
      * @param CustomizableAppConfig $appConfig
      * @return void
-     * @throws \Symfony\Component\Console\Exception\RuntimeException
      */
     public function process(InputInterface $input, OutputInterface $output, CustomizableAppConfig $appConfig)
     {
         $io = new SymfonyStyle($input, $output);
         $io->title('APPLICATION');
 
-        if ($appConfig->hasApp() && $io->confirm(
-            '<question>Do you want to keep imported application config? (Y/n):</question> '
-        )) {
+        if ($appConfig->hasApp() && $io->confirm('Do you want to keep imported application config?')) {
             return;
         }
 
         $appConfig->setApp([
-            'SECRET' => $this->ask(
-                $io,
+            'SECRET' => $io->ask(
                 'Define a secret string that will be used to sign API tokens (leave empty to autogenerate one)',
                 null,
-                true
+                function ($value) {
+                    return $value;
+                }
             ) ?: $this->generateRandomString(32),
         ]);
     }
diff --git a/module/CLI/src/Install/Plugin/DatabaseConfigCustomizerPlugin.php b/module/CLI/src/Install/Plugin/DatabaseConfigCustomizerPlugin.php
index 66144ccd..edb843d0 100644
--- a/module/CLI/src/Install/Plugin/DatabaseConfigCustomizerPlugin.php
+++ b/module/CLI/src/Install/Plugin/DatabaseConfigCustomizerPlugin.php
@@ -4,7 +4,6 @@ declare(strict_types=1);
 namespace Shlinkio\Shlink\CLI\Install\Plugin;
 
 use Shlinkio\Shlink\CLI\Model\CustomizableAppConfig;
-use Symfony\Component\Console\Exception\RuntimeException;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
@@ -35,7 +34,6 @@ class DatabaseConfigCustomizerPlugin extends AbstractConfigCustomizerPlugin
      * @param CustomizableAppConfig $appConfig
      * @return void
      * @throws IOException
-     * @throws RuntimeException
      */
     public function process(InputInterface $input, OutputInterface $output, CustomizableAppConfig $appConfig)
     {
diff --git a/module/CLI/src/Install/Plugin/LanguageConfigCustomizerPlugin.php b/module/CLI/src/Install/Plugin/LanguageConfigCustomizerPlugin.php
index 4acee568..5f37fd65 100644
--- a/module/CLI/src/Install/Plugin/LanguageConfigCustomizerPlugin.php
+++ b/module/CLI/src/Install/Plugin/LanguageConfigCustomizerPlugin.php
@@ -4,7 +4,6 @@ declare(strict_types=1);
 namespace Shlinkio\Shlink\CLI\Install\Plugin;
 
 use Shlinkio\Shlink\CLI\Model\CustomizableAppConfig;
-use Symfony\Component\Console\Exception\RuntimeException;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
@@ -18,32 +17,24 @@ class LanguageConfigCustomizerPlugin extends AbstractConfigCustomizerPlugin
      * @param OutputInterface $output
      * @param CustomizableAppConfig $appConfig
      * @return void
-     * @throws RuntimeException
      */
     public function process(InputInterface $input, OutputInterface $output, CustomizableAppConfig $appConfig)
     {
         $io = new SymfonyStyle($input, $output);
         $io->title('LANGUAGE');
 
-        if ($appConfig->hasLanguage() && $io->confirm(
-            '<question>Do you want to keep imported language? (Y/n):</question> '
-        )) {
+        if ($appConfig->hasLanguage() && $io->confirm('Do you want to keep imported language?')) {
             return;
         }
 
         $appConfig->setLanguage([
-            'DEFAULT' => $io->choice(
-                '<question>Select default language for the application in general (defaults to '
-                . self::SUPPORTED_LANGUAGES[0] . '):</question>',
-                self::SUPPORTED_LANGUAGES,
-                0
-            ),
-            'CLI' => $io->choice(
-                '<question>Select default language for CLI executions (defaults to '
-                . self::SUPPORTED_LANGUAGES[0] . '):</question>',
-                self::SUPPORTED_LANGUAGES,
-                0
-            ),
+            'DEFAULT' => $this->chooseLanguage('Select default language for the application in general', $io),
+            'CLI' => $this->chooseLanguage('Select default language for CLI executions', $io),
         ]);
     }
+
+    private function chooseLanguage(string $message, SymfonyStyle $io): string
+    {
+        return $io->choice($message, self::SUPPORTED_LANGUAGES, self::SUPPORTED_LANGUAGES[0]);
+    }
 }
diff --git a/module/CLI/src/Install/Plugin/UrlShortenerConfigCustomizerPlugin.php b/module/CLI/src/Install/Plugin/UrlShortenerConfigCustomizerPlugin.php
index f457bfa8..2be57759 100644
--- a/module/CLI/src/Install/Plugin/UrlShortenerConfigCustomizerPlugin.php
+++ b/module/CLI/src/Install/Plugin/UrlShortenerConfigCustomizerPlugin.php
@@ -5,7 +5,6 @@ namespace Shlinkio\Shlink\CLI\Install\Plugin;
 
 use Shlinkio\Shlink\CLI\Model\CustomizableAppConfig;
 use Shlinkio\Shlink\Core\Service\UrlShortener;
-use Symfony\Component\Console\Exception\RuntimeException;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
@@ -17,7 +16,6 @@ class UrlShortenerConfigCustomizerPlugin extends AbstractConfigCustomizerPlugin
      * @param OutputInterface $output
      * @param CustomizableAppConfig $appConfig
      * @return void
-     * @throws RuntimeException
      */
     public function process(InputInterface $input, OutputInterface $output, CustomizableAppConfig $appConfig)
     {