diff --git a/README.md b/README.md
index 405b861..1a7c60f 100644
--- a/README.md
+++ b/README.md
@@ -2,19 +2,6 @@
 
 This is a small (hopefully expanding in the future) collection of commands for `n98-magerun2`.
 
-## Installation
-
-### Quick install for CentOS 7
-
-This will install our [RPM repository](https://www.getpagespeed.com/redhat), `n98-magerun2` and the module:
-
-    yum install https://extras.getpagespeed.com/release-el7-latest.rpm
-    yum install n98-magerun2-module-getpagespeed
-
-### Other platforms
-
-Just place the files over to `/usr/local/share/n98-magerun2`.
-
 ## Commands available
 
 ### `n98-magerun2 varnish:tuned`
@@ -29,3 +16,33 @@ Largest product category has this number of products: 1715
 | 36015             | 60591          | 93359             |
 +-------------------+----------------+-------------------+
 ```
+
+### `n98-magerun2 dev:theme:active`
+
+Allows to get list of used themes. Example output (suitable for deploy static command):
+
+    --theme Swissup/argento-pure2
+
+This is useful for scripts to facilitate faster builds.
+
+Many Magento 2 themes come bundled with many actual themes, and deploying static assets takes huge time.
+All because you unnecessarily minify a ton of CSS and Javascript files for themes which are not even in use!
+
+You can deploy just the used themes with:
+
+    bin/magento setup:static-content:deploy --theme Magento/backend $(n98-magerun2 dev:theme:active)
+
+## Installation
+
+### Quick install for CentOS 7
+
+This will install our [RPM repository](https://www.getpagespeed.com/redhat), `n98-magerun2` and the module:
+
+    yum install https://extras.getpagespeed.com/release-el7-latest.rpm
+    yum install n98-magerun2-module-getpagespeed
+
+### Other platforms
+
+Just place the files over to `/usr/local/share/n98-magerun2`.
+
+
diff --git a/n98-magerun2.yaml b/n98-magerun2.yaml
index 7ad3b65..6db17e9 100644
--- a/n98-magerun2.yaml
+++ b/n98-magerun2.yaml
@@ -3,4 +3,5 @@ autoloaders:
 commands:  
   customCommands:
     - GetPageSpeed\VarnishTunedCommand
+    - GetPageSpeed\DevThemeActiveCommand
 
diff --git a/src/GetPageSpeed/DevThemeActiveCommand.php b/src/GetPageSpeed/DevThemeActiveCommand.php
new file mode 100644
index 0000000..607b88b
--- /dev/null
+++ b/src/GetPageSpeed/DevThemeActiveCommand.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace GetPageSpeed;
+
+use N98\Magento\Command\AbstractMagentoCommand;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+use Symfony\Component\Console\Input\InputOption;
+use N98\Util\Console\Helper\Table\Renderer\RendererFactory;
+
+class DevThemeActiveCommand extends AbstractMagentoCommand
+{
+
+    protected function configure()
+    {
+      $this
+          ->setName('dev:theme:active')
+          ->setDescription('Get list of used themes')
+          ->addOption(
+              'format',
+              null,
+              InputOption::VALUE_OPTIONAL,
+              'Output Format. One of [' . implode(',', RendererFactory::getFormats()) . ']'
+          )
+      ;
+    }
+
+   /**
+    * @param \Symfony\Component\Console\Input\InputInterface $input
+    * @param \Symfony\Component\Console\Output\OutputInterface $output
+    * @return int|void
+    */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $this->detectMagento($output);
+        if ($this->initMagento()) {
+            $objectManager = \Magento\Framework\App\ObjectManager::getInstance(); // Instance of object manager
+            $resource = $objectManager->get('Magento\Framework\App\ResourceConnection');
+            $connection = $resource->getConnection();
+ 
+            $themeTableName = $resource->getTableName('theme'); //gives table name with prefix
+            $configTableName = $resource->getTableName('core_config_data');
+            $sql = sprintf('SELECT theme_path FROM `%s` LEFT JOIN `%s` ON `value` = `theme_id` WHERE `path`=\'design/theme/theme_id\'',
+                $themeTableName, $configTableName); 
+            $res = $connection->fetchCol($sql);
+
+            if (!$input->getOption('format')) {
+                $out = array();
+                foreach ($res as $t) {
+                    $out[] = '--theme ' . $t;
+                }
+                $output->writeln(implode(' ', $out));
+            }
+
+            if ($input->getOption('format') == 'json') {
+                $output->writeln(
+                    json_encode($res, JSON_PRETTY_PRINT)
+                );
+            }
+        }
+    }
+}