diff --git a/sysctl.d/local.conf b/sysctl.d/local.conf
index af6a7b6..5b5e4eb 100644
--- a/sysctl.d/local.conf
+++ b/sysctl.d/local.conf
@@ -10,7 +10,10 @@ net.ipv6.conf.*.accept_redirects = 0
 net.ipv4.conf.default.rp_filter = 0
 net.ipv4.conf.*.rp_filter = 0
 
-net.ipv4.tcp_ecn = 1
+# use BBR and disable ECN since BBRv1 doesn't support it
+net.ipv4.tcp_congestion_control = bbr
+net.ipv4.tcp_ecn = 0
+
 net.ipv4.tcp_slow_start_after_idle = 0
 net.ipv4.tcp_shrink_window = 1
 net.ipv4.tcp_notsent_lowat = 131072