diff --git a/vpc-v2.cfndsl.rb b/vpc-v2.cfndsl.rb
index 89f614e..554922f 100644
--- a/vpc-v2.cfndsl.rb
+++ b/vpc-v2.cfndsl.rb
@@ -480,12 +480,12 @@
         DeviceIndex: 0,
         AssociatePublicIpAddress: true,
         Groups: [ Ref(:NatInstanceSecurityGroup) ]
-    }
+    } 
     if external_parameters[:nat_2023]
-      NetworkInterfaces: [{
+      network_interfaces: {
         NetworkInterfaceId: Ref("NetworkInterface#{az}"),
         DeviceIndex: 0
-      }]
+      }
     end  
     template_data = {
       TagSpecifications: [