diff --git a/utils/Commands/ClearcacheCommand.php b/utils/Commands/ClearcacheCommand.php
index 0aae1c010..6d9842803 100644
--- a/utils/Commands/ClearcacheCommand.php
+++ b/utils/Commands/ClearcacheCommand.php
@@ -6,6 +6,8 @@ use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Helper\QuestionHelper;
+use Symfony\Component\Console\Question\ConfirmationQuestion;
 
 use Seeddms\Seeddms\Settings;
 use Seeddms\Seeddms\Translator;
@@ -33,9 +35,10 @@ class ClearcacheCommand extends Command
     protected function configure()
     {
         $this->setName('cache:clear')
-            ->setDescription('Clears the cache')
-            ->setHelp('Clears all cache or those specified.')
-            ->addOption('cache', '', InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY, 'Remove files from cache.', null)
+            ->setDescription('Clear cache')
+            ->setHelp('Clears either all caches or those specified with option --cache. Think twice before you clear a cache with previews. Depending on the number of documents in your DMS, it may take a long time to recreate the cache.')
+            ->addOption('cache', '', InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY, 'Remove files from this cache.', null)
+            ->addOption('force', '', InputOption::VALUE_NONE, 'Force operation, do not ask')
         ;
     }
  
@@ -52,6 +55,14 @@ class ClearcacheCommand extends Command
             return Command::FAILURE;
         }
 
+        if (!$input->getOption('force')) {
+            $helper = new QuestionHelper();
+            $question = new ConfirmationQuestion('Do you really want to clear the cache? ', false);
+            if (!$helper->ask($input, $output, $question)) {
+                return Command::SUCCESS;
+            }
+        }
+
         require_once('inc/inc.DBInit.php');
 
         $post = array_flip($input->getOption('cache'));