diff --git a/frontend/mempool-frontend-config.sample.json b/frontend/mempool-frontend-config.sample.json
index 2b436b875..dd6eb970b 100644
--- a/frontend/mempool-frontend-config.sample.json
+++ b/frontend/mempool-frontend-config.sample.json
@@ -6,8 +6,7 @@
   "ELECTRS_ITEMS_PER_PAGE": 25,
   "KEEP_BLOCKS_AMOUNT": 8,
   "SPONSORS_ENABLED": false,
-  "BACKEND_URL": "http://127.0.0.1:8999",
-  "ELECTRS_URL": "http://127.0.0.1:4200",
-  "ELECTRS_URL_SERVER": "http://127.0.0.1:50001",
-  "STATIC_WEBSERVER_URL": "http://127.0.0.1:4200"
-}
\ No newline at end of file
+  "NGINX_PROTOCOL": "http",
+  "NGINX_HOSTNAME": "127.0.0.1",
+  "NGINX_PORT": "80"
+}