diff --git a/sysctl.d/local.conf b/sysctl.d/local.conf
index b4a8059..fe19e54 100644
--- a/sysctl.d/local.conf
+++ b/sysctl.d/local.conf
@@ -37,6 +37,7 @@ net.mptcp.enabled = 0
 net.netfilter.nf_conntrack_tcp_loose = 0
 net.netfilter.nf_conntrack_tcp_timeout_established = 14400
 net.netfilter.nf_conntrack_tcp_timeout_time_wait = 60
+net.netfilter.nf_conntrack_expect_max = 1
 
 kernel.yama.ptrace_scope = 2