diff --git a/postgres/bin/pg_replication b/postgres/bin/pg_replication
index 1e16541958c092f89b263dc544420ba3c8538980..4dede540c044de94d03170d4a02181851fdafac5 100755
--- a/postgres/bin/pg_replication
+++ b/postgres/bin/pg_replication
@@ -161,6 +161,7 @@ function configure () {
 
     sysctl -w kernel.sem="250 32000 100 200"
     echo "250 32000 100 200" > /proc/sys/kernel/sem
+    echo "kernel.sem = 250 32000 100 200" >> /etc/sysctl.conf
 
     # Exchange RSA keys
     exchange_rsa_keys