diff --git a/flag.module b/flag.module
index 28fc32b..60b8435 100644
--- a/flag.module
+++ b/flag.module
@@ -145,6 +145,20 @@ function flag_entity_extra_field_info() {
 }
 
 /**
+ * Implements hook_theme().
+ */
+function flag_theme($existing, $type, $theme, $path) {
+  return [
+    'flag' => [
+      'variables' => [
+        'attributes' => [],
+        'title' => NULL,
+      ],
+    ],
+  ];
+}
+
+/**
  * Implements hook_node_links_alter().
  */
 function flag_node_links_alter(array &$links, NodeInterface $entity, array &$context) {
diff --git a/src/ActionLinkTypeBase.php b/src/ActionLinkTypeBase.php
index 2c86a1e..c606730 100644
--- a/src/ActionLinkTypeBase.php
+++ b/src/ActionLinkTypeBase.php
@@ -84,18 +84,21 @@ abstract class ActionLinkTypeBase extends PluginBase implements ActionLinkTypePl
     $url = $this->getLinkURL($action, $flag, $entity);
 
     $url->setRouteParameter('destination', $this->getDestination());
+    
+    // Get the Flag URL.
+    $render = [];
+    $render['#attributes']['href'] = $url->toString();
 
-    $render = $url->toRenderArray();
-    $render['#type'] = 'link';
+    $render['#theme'] = 'flag';
     $render['#attributes']['id'] = 'flag-' . $flag->id() . '-id-' . $entity->id();
 
     if ($action === 'unflag') {
       $render['#title'] = $flag->getUnflagShortText();
-      $render['#alt'] = $flag->getUnflagLongText();
+      $render['#attributes']['#alt'] = $flag->getUnflagLongText();
     }
     else {
       $render['#title'] = $flag->getFlagShortText();
-      $render['#alt'] = $flag->getFlagLongText();
+      $render['#attributes']['alt'] = $flag->getFlagLongText();
     }
 
     return $render;
diff --git a/templates/flag.html.twig b/templates/flag.html.twig
new file mode 100644
index 0000000..132168f
--- /dev/null
+++ b/templates/flag.html.twig
@@ -0,0 +1,11 @@
+{#
+/**
+ * @file
+ * Default theme implementation for flag links.
+ *
+ * Available variables:
+ * - attributes: HTML attributes for the containing element.
+ * - title: The flag link title.
+ */
+#}
+<a{{ attributes.addClass('flag') }}>{{ title }}</a>
\ No newline at end of file