diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index 5e6fe6e2..9124b498 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -1,3 +1,5 @@
+# nginx 1.20.x
+
 load_module modules/ngx_http_brotli_static_module.so;
 
 user nginx;
@@ -18,7 +20,6 @@ http {
     sendfile on;
     sendfile_max_chunk 512k;
     tcp_nopush on;
-    keepalive_requests 1000;
     keepalive_timeout 65;
     types_hash_max_size 4096;
     server_tokens off;
@@ -28,14 +29,11 @@ http {
     client_body_buffer_size 1k;
     client_header_buffer_size 1k;
     large_client_header_buffers 4 4k;
-    http2_max_field_size 4k;
-    http2_max_header_size 16k;
     http2_recv_buffer_size 128k;
 
     client_body_timeout 30s;
     client_header_timeout 30s;
     send_timeout 30s;
-    http2_recv_timeout 30s;
 
     http2_max_concurrent_streams 32;
     limit_conn_status 429;