diff --git a/bundles/wireguard/metadata.py b/bundles/wireguard/metadata.py
index 3a59f3c..0d1a4f9 100644
--- a/bundles/wireguard/metadata.py
+++ b/bundles/wireguard/metadata.py
@@ -20,10 +20,10 @@ defaults = {
     },
     'iptables': {
         'bundle_rules': {
-            'wireguard': {
+            'wireguard': [
                 'iptables_both -A FORWARD -i wg0 -j ACCEPT',
                 'iptables_both -A FORWARD -o wg0 -j ACCEPT',
-            },
+            ],
         },
     },
     'wireguard': {