diff --git a/machines/nixos/vault01/networking.nix b/machines/nixos/vault01/networking.nix
index 4679ae7..f41de3a 100644
--- a/machines/nixos/vault01/networking.nix
+++ b/machines/nixos/vault01/networking.nix
@@ -207,6 +207,7 @@ in
             IPv6AcceptRA = false;
             IPv6SendRA = false;
           };
+          linkConfig.MTUBytes = 1500;
         };
         "50-wg0" = {
           name = "wg0";