diff --git a/nix/nixos-module/container/upstream.nix b/nix/nixos-module/container/upstream.nix
index 4cc5c80..05e0142 100644
--- a/nix/nixos-module/container/upstream.nix
+++ b/nix/nixos-module/container/upstream.nix
@@ -61,6 +61,7 @@ in
 
   networking.nat = lib.optionalAttrs enabled {
     enable = true;
+    enableIPv6 = true;
     internalInterfaces = [ "core" ];
     externalInterface = firstUpstreamInterface;
     externalIP = staticIpv4Address;