diff --git a/templates/parts/resource-download-box.php b/templates/parts/resource-download-box.php
index b69d213c..81ec3e44 100644
--- a/templates/parts/resource-download-box.php
+++ b/templates/parts/resource-download-box.php
@@ -358,7 +358,7 @@ if ($is_need_purchase && $user_amount > 0) {
 					if ($is_need_login) {
 						$btn_href = $login_url;
 						$btn_text = __('登录后下载', 'aksrt');
-						$btn_icon = $icon_markup !== '' ? $icon_markup : '<i class="fa fa-sign-in-alt" aria-hidden="true"></i>';
+						$btn_icon = $icon_markup !== '' ? $icon_markup : '<i class="fa fas fa-sign-in-alt" aria-hidden="true"></i>';
 						$btn_extra_class = '';
 						$btn_modifier = ' resource-download-box__btn--login';
 						$btn_target = '';
@@ -366,7 +366,7 @@ if ($is_need_purchase && $user_amount > 0) {
 					} else {
 						$btn_href = $url;
 						$btn_text = $label;
-						$btn_icon = $icon_markup !== '' ? $icon_markup : '<i class="fa fa-download" aria-hidden="true"></i>';
+						$btn_icon = $icon_markup !== '' ? $icon_markup : '<i class="fa fas fa-download" aria-hidden="true"></i>';
 						$btn_extra_class = $button_class !== '' ? ' ' . $button_class : '';
 						$btn_modifier = ($has_paid_access ? ' resource-download-box__btn--owned' : '') . ($button_class !== '' ? ' resource-download-box__btn--custom' : '');
 						$btn_target = ' target="_blank"';