diff --git a/conf/nginx/dev4.4nkweb.com.conf b/conf/nginx/dev4.4nkweb.com.conf
index 6c38085..43bafad 100644
--- a/conf/nginx/dev4.4nkweb.com.conf
+++ b/conf/nginx/dev4.4nkweb.com.conf
@@ -85,6 +85,19 @@ server {
         proxy_send_timeout 300;
     }
 
+    # WebSocket relay (sdk_relay)
+    location /ws/ {
+        proxy_pass http://127.0.0.1:8090/;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_read_timeout 300;
+    }
+
     # ihm_client (root)
     location / {
         proxy_pass http://127.0.0.1:3003;