diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index 1f586b81..eb1aef0a 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -20,7 +20,8 @@ http {
         resolver 8.8.8.8 valid=100s ipv6=off;
         listen 3000;
         location / {
-            echo_sleep 0.4; # Delay each request by 4ms
+            # Delay each request by 4ms
+            access_by_lua_block { ngx.sleep(0.004) }
             proxy_set_header Host $proxy_host;
             proxy_ssl_verify off;
             proxy_ssl_server_name on;