diff --git a/libtransmission/announcer-http.cc b/libtransmission/announcer-http.cc
index 5f2a7af25..f9a015850 100644
--- a/libtransmission/announcer-http.cc
+++ b/libtransmission/announcer-http.cc
@@ -344,8 +344,8 @@ void tr_tracker_http_announce(
 
     auto options = tr_web::FetchOptions{ url.sv(), onAnnounceDone, d };
     options.timeout_secs = 90L;
-    options.sndbuf = 1024;
-    options.rcvbuf = 3072;
+    options.sndbuf = 4096;
+    options.rcvbuf = 4096;
     session->web->fetch(std::move(options));
 }