diff --git a/css/module/google_currency_converter.module.css b/css/module/google_currency_converter.module.css
new file mode 100644
index 0000000..c7b5d7c
--- /dev/null
+++ b/css/module/google_currency_converter.module.css
@@ -0,0 +1,3 @@
+.gcc-select-list {
+  width: 250px;
+}
diff --git a/google_currency_converter.libraries.yml b/google_currency_converter.libraries.yml
new file mode 100644
index 0000000..20d555e
--- /dev/null
+++ b/google_currency_converter.libraries.yml
@@ -0,0 +1,5 @@
+drupal.google_currency_converter:
+  version: VERSION
+  css:
+    component:
+      css/google_currency_converter.module.css: {}
diff --git a/src/Form/GoogleCurrencyConverterForm.php b/src/Form/GoogleCurrencyConverterForm.php
index d0d6d1f..b59823b 100644
--- a/src/Form/GoogleCurrencyConverterForm.php
+++ b/src/Form/GoogleCurrencyConverterForm.php
@@ -55,6 +55,7 @@ class GoogleCurrencyConverterForm extends FormBase {
       '#title' => t('Select Your Currency From'),
       '#options' => $this->googleCurrencyConveter->countries(),
       '#default_value' => '',
+      '#attributes' => array('class' => array('gcc-select-list')),
       '#required' => TRUE,
     );
     $form['google_currency_converter_to'] = array(
@@ -62,6 +63,7 @@ class GoogleCurrencyConverterForm extends FormBase {
       '#title' => t('Select Your Currency To'),
       '#options' => $this->googleCurrencyConveter->countries(),
       '#default_value' => '',
+      '#attributes' => array('class' => array('gcc-select-list')),
       '#required' => TRUE,
     );
     $form['amount'] = array(
diff --git a/src/Plugin/Block/GoogleCurrencyConverterBlock.php b/src/Plugin/Block/GoogleCurrencyConverterBlock.php
index fbcadc9..1ead9b0 100644
--- a/src/Plugin/Block/GoogleCurrencyConverterBlock.php
+++ b/src/Plugin/Block/GoogleCurrencyConverterBlock.php
@@ -111,11 +111,11 @@ class GoogleCurrencyConverterBlock extends BlockBase implements ContainerFactory
   public function build() {
 
     $config = $this->getConfiguration();
-    $render = [];
     $form = $this->formBuilder->getForm('Drupal\google_currency_converter\Form\GoogleCurrencyConverterForm');
     $form['google_currency_converter_from']['#default_value'] = $config['google_currency_converter_from'];
     $form['google_currency_converter_to']['#default_value'] = $config['google_currency_converter_to'];
-    $render['google_currency_converter_form'] = $form;
+    $render['block'] = $form;
+    $render['block']['#attached']['library'] = ['google_currency_converter/drupal.google_currency_converter'];
     return $render;
   }