diff --git a/adm/config_form.php b/adm/config_form.php
index 016355d11..4a8bdd8e9 100644
--- a/adm/config_form.php
+++ b/adm/config_form.php
@@ -1183,7 +1183,7 @@ include_once('_rewrite_config_form.php');
         <tr>
             <th scope="row"><label for="cf_kakao_rest_key">카카오 REST API 키</label></th>
             <td>
-                <input type="text" name="cf_kakao_rest_key" value="<?php echo $config['cf_kakao_rest_key'] ?>" id="cf_kakao_rest_key" class="frm_input" size="40"> <a href="https://developers.kakao.com/apps/new" target="_blank" class="btn_frmline">앱 등록하기</a>
+                <input type="text" name="cf_kakao_rest_key" value="<?php echo $config['cf_kakao_rest_key'] ?>" id="cf_kakao_rest_key" class="frm_input" size="40"> <a href="https://developers.kakao.com/product/kakaoLogin" target="_blank" class="btn_frmline">앱 등록하기</a>
             </td>
             <th scope="row"><label for="cf_kakao_client_secret">카카오 Client Secret</label></th>
             <td>
diff --git a/mobile/skin/social/social_login.skin.php b/mobile/skin/social/social_login.skin.php
index e7af20ad9..0e2871875 100644
--- a/mobile/skin/social/social_login.skin.php
+++ b/mobile/skin/social/social_login.skin.php
@@ -14,7 +14,7 @@ if( G5_SOCIAL_USE_POPUP ) {
     $self_url = G5_SOCIAL_LOGIN_URL.'/popup.php';
 }
 
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 10);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 10);
 ?>
 
 <div class="login-sns sns-wrap-32 sns-wrap-over" id="sns_login">
diff --git a/mobile/skin/social/social_outlogin.skin.1.php b/mobile/skin/social/social_outlogin.skin.1.php
index d5e53f562..039fee2a0 100644
--- a/mobile/skin/social/social_outlogin.skin.1.php
+++ b/mobile/skin/social/social_outlogin.skin.1.php
@@ -14,7 +14,7 @@ if( G5_SOCIAL_USE_POPUP ) {
     $self_url = G5_SOCIAL_LOGIN_URL.'/popup.php';
 }
 
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 10);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 10);
 ?>
 
 <div class="login-sns sns-wrap-32 sns-wrap-over" id="sns_outlogin">
diff --git a/mobile/skin/social/social_register.skin.php b/mobile/skin/social/social_register.skin.php
index c07a92c15..5d8048038 100644
--- a/mobile/skin/social/social_register.skin.php
+++ b/mobile/skin/social/social_register.skin.php
@@ -15,7 +15,7 @@ if( G5_SOCIAL_USE_POPUP ) {
 }
 
 // add_stylesheet('css 구문', 출력순서); 숫자가 작을 수록 먼저 출력됨
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 10);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 10);
 ?>
 <div>
     <div class="login-sns sns-wrap-32 sns-wrap-over" id="sns_register">
diff --git a/mobile/skin/social/social_register_member.skin.php b/mobile/skin/social/social_register_member.skin.php
index e0a150434..e8e88948b 100644
--- a/mobile/skin/social/social_register_member.skin.php
+++ b/mobile/skin/social/social_register_member.skin.php
@@ -8,7 +8,7 @@ if( ! $config['cf_social_login_use']) {     //소셜 로그인을 사용하지 
 // add_stylesheet('css 구문', 출력순서); 숫자가 작을 수록 먼저 출력됨
 add_stylesheet('<link rel="stylesheet" href="'.G5_JS_URL.'/remodal/remodal.css">', 11);
 add_stylesheet('<link rel="stylesheet" href="'.G5_JS_URL.'/remodal/remodal-default-theme.css">', 12);
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 13);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 13);
 add_javascript('<script src="'.G5_JS_URL.'/remodal/remodal.js"></script>', 10);
 
 $email_msg = $is_exists_email ? '등록할 이메일이 중복되었습니다.다른 이메일을 입력해 주세요.' : '';
diff --git a/mobile/skin/social/social_u_register_form.skin.php b/mobile/skin/social/social_u_register_form.skin.php
index ddf329627..3bd5ac0fe 100644
--- a/mobile/skin/social/social_u_register_form.skin.php
+++ b/mobile/skin/social/social_u_register_form.skin.php
@@ -9,7 +9,7 @@ $socials = social_get_provider_service_name('', 'all');
 
 $session_id = session_id();
 
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 10);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 10);
 ?>
 
 <li>
diff --git a/skin/social/social_login.skin.php b/skin/social/social_login.skin.php
index e81d1393a..f93fd403f 100644
--- a/skin/social/social_login.skin.php
+++ b/skin/social/social_login.skin.php
@@ -14,7 +14,7 @@ if( G5_SOCIAL_USE_POPUP ) {
     $self_url = G5_SOCIAL_LOGIN_URL.'/popup.php';
 }
 
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 10);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 10);
 ?>
 
 <div id="sns_login" class="login-sns sns-wrap-32 sns-wrap-over">
diff --git a/skin/social/social_outlogin.skin.1.php b/skin/social/social_outlogin.skin.1.php
index 228cd80d3..a6a55a2d2 100644
--- a/skin/social/social_outlogin.skin.1.php
+++ b/skin/social/social_outlogin.skin.1.php
@@ -14,7 +14,7 @@ if( G5_SOCIAL_USE_POPUP ) {
     $self_url = G5_SOCIAL_LOGIN_URL.'/popup.php';
 }
 
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 10);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 10);
 ?>
 
 <div class="login-sns sns-wrap-32 sns-wrap-over" id="sns_outlogin">
diff --git a/skin/social/social_register.skin.php b/skin/social/social_register.skin.php
index 0a26c6e88..f2beab376 100644
--- a/skin/social/social_register.skin.php
+++ b/skin/social/social_register.skin.php
@@ -15,7 +15,7 @@ if( G5_SOCIAL_USE_POPUP ) {
 }
 
 // add_stylesheet('css 구문', 출력순서); 숫자가 작을 수록 먼저 출력됨
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 10);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 10);
 ?>
 <div>
 
diff --git a/skin/social/social_register_member.skin.php b/skin/social/social_register_member.skin.php
index 13fd8ee27..8885783ed 100644
--- a/skin/social/social_register_member.skin.php
+++ b/skin/social/social_register_member.skin.php
@@ -8,7 +8,7 @@ if( ! $config['cf_social_login_use']) {     //소셜 로그인을 사용하지 
 // add_stylesheet('css 구문', 출력순서); 숫자가 작을 수록 먼저 출력됨
 add_stylesheet('<link rel="stylesheet" href="'.G5_JS_URL.'/remodal/remodal.css">', 11);
 add_stylesheet('<link rel="stylesheet" href="'.G5_JS_URL.'/remodal/remodal-default-theme.css">', 12);
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 13);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 13);
 add_javascript('<script src="'.G5_JS_URL.'/remodal/remodal.js"></script>', 10);
 
 $email_msg = $is_exists_email ? '등록할 이메일이 중복되었습니다.다른 이메일을 입력해 주세요.' : '';
diff --git a/skin/social/social_u_register_form.skin.php b/skin/social/social_u_register_form.skin.php
index 2c036b1c9..e361c3aba 100644
--- a/skin/social/social_u_register_form.skin.php
+++ b/skin/social/social_u_register_form.skin.php
@@ -9,7 +9,7 @@ $socials = social_get_provider_service_name('', 'all');
 
 $session_id = session_id();
 
-add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css">', 10);
+add_stylesheet('<link rel="stylesheet" href="'.get_social_skin_url().'/style.css?ver='.G5_CSS_VER.'">', 10);
 ?>
 
 <li>