diff --git a/debian9-x86_64.sh b/debian9-x86_64.sh
index 1309b04..4bd665e 100644
--- a/debian9-x86_64.sh
+++ b/debian9-x86_64.sh
@@ -257,9 +257,9 @@ fi
 
 # Add OpenMPTCProuter VPS script version to /etc/motd
 if grep --quiet 'OpenMPTCProuter VPS' /etc/motd; then
-	sed -i 's:< OpenMPTCProuter VPS [0-9]*\.[0-9]* >:< OpenMPCTProuter VPS 0.42 >:' /etc/motd
+	sed -i 's:< OpenMPTCProuter VPS [0-9]*\.[0-9]* >:< OpenMPCTProuter VPS 0.43 >:' /etc/motd
 else
-	echo '< OpenMPTCProuter VPS 0.42 >' >> /etc/motd
+	echo '< OpenMPTCProuter VPS 0.43 >' >> /etc/motd
 fi
 
 if [ "$update" = "0" ]; then
diff --git a/shadowsocks.conf b/shadowsocks.conf
index f0d9efc..9a9e4c6 100644
--- a/shadowsocks.conf
+++ b/shadowsocks.conf
@@ -42,7 +42,7 @@ net.ipv4.tcp_wmem = 4096 87380 134217728
 net.ipv4.tcp_mtu_probing = 0
 
 # for low-latency network, use cubic instead
-net.ipv4.tcp_congestion_control = olia
+net.ipv4.tcp_congestion_control = bbr
 
 # Default conntrack is too small
 net.netfilter.nf_conntrack_max = 131072