diff --git a/openvpn-install.sh b/openvpn-install.sh
index d502256..bbf341a 100755
--- a/openvpn-install.sh
+++ b/openvpn-install.sh
@@ -497,6 +497,7 @@ keepalive 10 120
 topology subnet
 server 10.8.0.0 255.255.255.0
 duplicate-cn
+ifconfig-pool-persist ipp.txt
 push \"route 10.8.0.0 255.255.255.0\"" >> /etc/openvpn/server.conf
     # DNS resolvers
     case $DNS in