diff --git a/Caddyfile b/Caddyfile
index 09b2b84..e3721d6 100644
--- a/Caddyfile
+++ b/Caddyfile
@@ -16,6 +16,11 @@ http://promptplace.kro.kr {
                 Referrer-Policy "strict-origin-when-cross-origin"
         }
 
+        # Socket.IO 요청을 백엔드로 전달
+        handle /socket.io/* {
+                reverse_proxy app:3000
+        }
+
         # api-docs 요청을 앱으로 전달
         handle /api-docs* {
                 reverse_proxy app:3000
@@ -59,6 +64,11 @@ http://promptplace-dev.kro.kr {
         Referrer-Policy "strict-origin-when-cross-origin"
     }
 
+    # Socket.IO 요청을 백엔드로 전달
+    handle /socket.io/* {
+        reverse_proxy app-dev:3000
+    }
+
     handle /api/* {
         # app-dev 컨테이너(테스트용)로 연결
         reverse_proxy app-dev:3000 {
diff --git a/src/socket/server.ts b/src/socket/server.ts
index 9894e56..edd9d45 100644
--- a/src/socket/server.ts
+++ b/src/socket/server.ts
@@ -83,6 +83,7 @@ export const initSocket = (httpServer: HttpServer) => {
         "https://promptplace-develop.vercel.app",
       ],
       methods: ["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"],
+      allowedHeaders: ["Authorization", "Content-Type"],
       credentials: true
     }
   });