diff --git a/conf/install_openvpn.conf.sample b/conf/install_openvpn.conf.sample
index cecaab1..0a37f01 100644
--- a/conf/install_openvpn.conf.sample
+++ b/conf/install_openvpn.conf.sample
@@ -17,6 +17,8 @@ CA_EXPIRE=11688
 # - (3*365+366)*5 = 7305 = 20 Jahre
 KEY_EXPIRE=7305
 
+KEY_SIZE=4096
+
 KEY_COUNTRY="DE"
 KEY_PROVINCE="Berlin"
 KEY_CITY="Berlin"