diff --git a/ngx_http_js_challenge.c b/ngx_http_js_challenge.c
index c013fd3..ac93c80 100644
--- a/ngx_http_js_challenge.c
+++ b/ngx_http_js_challenge.c
@@ -235,6 +235,7 @@ int serve_challenge(ngx_http_request_t *r, const char *challenge, const char *ht
     ngx_http_send_header(r);
 
     ngx_http_output_filter(r, &out);
+    ngx_http_finalize_request(r, 0);
     return NGX_DONE;
 }