diff --git a/peer/http3/server.go b/peer/http3/server.go
index 30ae3fd..d81f0f8 100644
--- a/peer/http3/server.go
+++ b/peer/http3/server.go
@@ -65,9 +65,14 @@ type availabilityResponse struct {
 // Start starts the server listener to handle connections.
 func (s *Server) Start(address string) error {
 	log.Println("HTTP3 peer listening on " + address)
+	window500M := 500 * 1 << 20
+
 	quicConf := &quic.Config{
-		HandshakeIdleTimeout: 4 * time.Second,
-		MaxIdleTimeout:       20 * time.Second,
+		MaxStreamReceiveWindow:     uint64(window500M),
+		MaxConnectionReceiveWindow: uint64(window500M),
+		EnableDatagrams:            true,
+		HandshakeIdleTimeout:       4 * time.Second,
+		MaxIdleTimeout:             20 * time.Second,
 	}
 	r := mux.NewRouter()
 	r.HandleFunc("/get/{hash}", func(w http.ResponseWriter, r *http.Request) {
diff --git a/peer/http3/store.go b/peer/http3/store.go
index bcc7cae..7d8fc34 100644
--- a/peer/http3/store.go
+++ b/peer/http3/store.go
@@ -36,6 +36,10 @@ func NewStore(opts StoreOpts) *Store {
 
 func (p *Store) getClient() (*Client, error) {
 	var qconf quic.Config
+	window500M := 500 * 1 << 20
+	qconf.MaxStreamReceiveWindow = uint64(window500M)
+	qconf.MaxConnectionReceiveWindow = uint64(window500M)
+	qconf.EnableDatagrams = true
 	qconf.HandshakeIdleTimeout = 4 * time.Second
 	qconf.MaxIdleTimeout = 20 * time.Second
 	pool, err := x509.SystemCertPool()