diff --git a/index.html b/index.html
index d1c7af62..34cb9574 100644
--- a/index.html
+++ b/index.html
@@ -1,18 +1,43 @@
 <!DOCTYPE html>
 <html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/assets/MainLogo.svg" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>같이가요</title>
-  </head>
-  <body>
-    <div id="root"></div>
-    <script type="module" src="/src/main.tsx"></script>
-    <script
-      type="text/javascript"
-      src="//dapi.kakao.com/v2/maps/sdk.js?appkey=%VITE_KAKAO_MAP_API_KEY%&libraries=services,clusterer&autoload=true"
-    ></script>
-    <script src="https://developers.kakao.com/sdk/js/kakao.js"></script>
-  </body>
-</html>
+
+<head>
+  <meta charset="UTF-8" />
+  <link rel="icon" type="image/svg+xml" href="/assets/MainLogo.svg" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+
+  <!-- Google Tag Manager -->
+  <script>
+    (function (w, d, s, l, i) {
+      w[l] = w[l] || []; w[l].push({ 'gtm.start': new Date().getTime(), event: 'gtm.js' }); 
+      var f = d.getElementsByTagName(s)[0], j = d.createElement(s), dl = l != 'dataLayer' ? '&l=' + l : ''; 
+      j.async = true; 
+      j.src = 'https://www.googletagmanager.com/gtm.js?id=' + i + dl; f.parentNode.insertBefore(j, f);
+    })(window, document, 'script', 'dataLayer', 'GTM-MR6M73KS');
+  </script>
+  <!-- End Google Tag Manager -->
+
+  <title>같이가요</title>
+</head>
+
+<body>
+  <div id="root"></div>
+  <script type="module" src="/src/main.tsx"></script>
+  <script type="text/javascript"
+    src="//dapi.kakao.com/v2/maps/sdk.js?appkey=%VITE_KAKAO_MAP_API_KEY%&libraries=services,clusterer&autoload=true"></script>
+  <script src="https://developers.kakao.com/sdk/js/kakao.js"></script>
+
+<!-- Google Tag Manager (noscript) -->
+<noscript>
+  <iframe 
+    src="https://www.googletagmanager.com/ns.html?id=GTM-MR6M73KS"
+    height="0" 
+    width="0" 
+    style="display:none;visibility:hidden"
+  ></iframe>
+</noscript>
+<!-- End Google Tag Manager (noscript) -->
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/src/features/join/hooks/useUserHook.ts b/src/features/join/hooks/useUserHook.ts
index a5e3a489..26a335b9 100644
--- a/src/features/join/hooks/useUserHook.ts
+++ b/src/features/join/hooks/useUserHook.ts
@@ -38,8 +38,8 @@ export const useSendCertificationCode = () => {
       alert('인증번호를 발송했습니다.');
     },
     onError: (error: AxiosError<any>) => {
-      if (error.result) {
-        const allMessages = Object.values(error.result).join('\n');
+      if (error.response?.data) {
+        const allMessages = Object.values(error.response.data.result).join('\n');
         alert(allMessages);
       } else {
         alert(error.message || '인증번호 발송에 실패하였습니다.');
@@ -57,8 +57,8 @@ export const useVerifyCertificationCode = () => {
       alert('인증에 성공했습니다.');
     },
     onError: (error: AxiosError<any>) => {
-      if (error.result) {
-        const allMessages = Object.values(error.result).join('\n');
+      if (error.response?.data) {
+        const allMessages = Object.values(error.response.data.result).join('\n');
         alert(allMessages);
       } else {
         alert(error.message || '인증에 실패하였습니다.');
