diff --git a/samples/net/sockets/big_http_download/prj.conf b/samples/net/sockets/big_http_download/prj.conf
index 9209f281ca2..02b7e11d39e 100644
--- a/samples/net/sockets/big_http_download/prj.conf
+++ b/samples/net/sockets/big_http_download/prj.conf
@@ -14,7 +14,10 @@ CONFIG_NET_SOCKETS_POSIX_NAMES=y
 CONFIG_NET_CONTEXT_RCVTIMEO=y
 CONFIG_NET_CONTEXT_SNDTIMEO=y
 
+CONFIG_NET_TCP_MAX_RECV_WINDOW_SIZE=5120
+
 CONFIG_NET_PKT_TX_COUNT=6
+CONFIG_NET_BUF_RX_COUNT=64
 
 CONFIG_DNS_RESOLVER=y
 CONFIG_DNS_SERVER_IP_ADDRESSES=y