diff --git a/server/src/main/resources/templates/admin/key.html b/server/src/main/resources/templates/admin/key.html
index f0acab9..89bc4dc 100644
--- a/server/src/main/resources/templates/admin/key.html
+++ b/server/src/main/resources/templates/admin/key.html
@@ -64,9 +64,9 @@ <h1 class="text-center mb-4">API 키 관리</h1>
         fetch('/admin/api/key', {
             method: 'POST',
             headers: {
-                'Content-Type': 'application/json'
+                'Content-Type': 'text/plain'
             },
-            body: JSON.stringify(apiKey)
+            body: apiKey
         })
             .then(response => {
                 if (response.ok) {