diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index 902cfb8..0dfa16d 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -1210,6 +1210,7 @@
 
         r->http_version = NGX_HTTP_VERSION_9;
         u->state->status = NGX_HTTP_OK;
+        u->headers_in.connection_close = 1;
 
         return NGX_OK;
     }
@@ -1234,6 +1235,10 @@
                    "http proxy status %ui \"%V\"",
                    u->headers_in.status_n, &u->headers_in.status_line);
 
+    if (ctx->status.http_version < NGX_HTTP_VERSION_11) {
+        u->headers_in.connection_close = 1;
+    }
+
     u->process_header = ngx_http_proxy_process_header;
 
     return ngx_http_proxy_process_header(r);