diff --git a/src/proxy/udp_proxy.c b/src/proxy/udp_proxy.c
index d2abee29..35d427ab 100644
--- a/src/proxy/udp_proxy.c
+++ b/src/proxy/udp_proxy.c
@@ -40,7 +40,7 @@ static struct udp_flow* flow_find(struct udp_flow* head, uint64_t client_node_id
 static void flow_read_cb(socket_t sock, void* arg) {
     (void)sock; struct udp_flow* f = (struct udp_flow*)arg;
     if (!f || f->sock == SOCKET_INVALID || !g_udp_ctx) return;
-    uint8_t buf[65536];
+    uint8_t buf[1600];
     struct sockaddr_in from; socklen_t flen = sizeof(from);
     ssize_t n = recvfrom(f->sock, buf, sizeof(buf), 0, (struct sockaddr*)&from, &flen);
     if (n <= 0) return;