diff --git a/contrib/etc_default/osmo-remsim-bankd b/contrib/etc_default/osmo-remsim-bankd
index 9f8a9a9..34c1821 100644
--- a/contrib/etc_default/osmo-remsim-bankd
+++ b/contrib/etc_default/osmo-remsim-bankd
@@ -1,5 +1,5 @@
 # Default settings for osmo-remsim-bankd This file is sourced by systemd
 
 # Options to pass to osmo-remsim-bankd
-BANKD_OPTS="-i 10.9.99.1 -n 5"
+BANKD_OPTS="-i 127.0.0.1 -n 5"
 
diff --git a/contrib/etc_default/osmo-remsim-client b/contrib/etc_default/osmo-remsim-client
index 6c977f1..d4f5514 100644
--- a/contrib/etc_default/osmo-remsim-client
+++ b/contrib/etc_default/osmo-remsim-client
@@ -1,4 +1,4 @@
 # Default settings for osmo-remsim-client This file is sourced by systemd
 
 # Options to pass to osmo-remsim-client
-GLOBAL_CLIENT_OPTS="-i 10.9.99.10 -V 1d50 -P 4004 -C 1"
+GLOBAL_CLIENT_OPTS="-i 127.0.0.1 -V 1d50 -P 4004 -C 1"