diff --git a/lib/archethic_web/controllers/api/web_hosting_controller/resources.ex b/lib/archethic_web/controllers/api/web_hosting_controller/resources.ex
index 33716d0a2..d4f5ccd18 100644
--- a/lib/archethic_web/controllers/api/web_hosting_controller/resources.ex
+++ b/lib/archethic_web/controllers/api/web_hosting_controller/resources.ex
@@ -82,7 +82,15 @@ defmodule ArchethicWeb.API.WebHostingController.Resources do
     case Map.get(metadata, resource_path) do
       nil ->
         if is_a_directory?(metadata, resource_path) do
-          {:error, :is_a_directory}
+          index_path = resource_path <> "/index.html"
+
+          case Map.get(metadata, index_path) do
+            nil ->
+              {:error, :is_a_directory}
+
+            file ->
+              {:ok, file, MIME.from_path("index.html"), index_path}
+          end
         else
           # Handle JS History API by serving index.html instead of a 404
           # We loose the ability to return real 404 errors
diff --git a/src/c/nat/miniupnp b/src/c/nat/miniupnp
index 72b33d714..99fc9941a 160000
--- a/src/c/nat/miniupnp
+++ b/src/c/nat/miniupnp
@@ -1 +1 @@
-Subproject commit 72b33d7145219e58c19dc5e8521a2e5c86c72cb9
+Subproject commit 99fc9941aa301323307a865f3798f64d189cc544