diff --git a/vpn/vpn-config.tf b/vpn/vpn-config.tf
index ac1ab2c..d6f1a8d 100644
--- a/vpn/vpn-config.tf
+++ b/vpn/vpn-config.tf
@@ -1,10 +1,10 @@
 locals {
   vpn_tunnel_outputs = { for k, v in local.vpn_settings : k => {
     site              = v.site
-    environment       = lookup(v, "environment", null)
-    sequence          = lookup(v, "sequence", null)
-    label             = lookup(v, "label", null)
-    full_label        = format("aws:%v:%v:%v:%v", local.region, local.account_id, aws_vpn_connection.vpn[k].id, lookup(v, "label", null))
+    environment       = lookup(v, "environment", "")
+    sequence          = lookup(v, "sequence", "")
+    label             = lookup(v, "label", "")
+    full_label        = format("aws:%v:%v:%v:%v", local.region, local.account_id, aws_vpn_connection.vpn[k].id, lookup(v, "label", ""))
     customer_address  = aws_customer_gateway.vpn[k].ip_address
     bgp_asn           = aws_customer_gateway.vpn[k].bgp_asn
     vpn_connection_id = aws_vpn_connection.vpn[k].id