diff --git a/lib/web/views/error_view.ex b/lib/web/views/error_view.ex
index 4cbc238a2..8d4ba7780 100644
--- a/lib/web/views/error_view.ex
+++ b/lib/web/views/error_view.ex
@@ -51,6 +51,10 @@ defmodule Mobilizon.Web.ErrorView do
     render("500.html", assigns)
   end
 
+  def render("500.activity-json", assigns) do
+    render("500.html", assigns)
+  end
+
   def render("500.html", assigns) do
     Mobilizon.Config.instance_config()
     |> Keyword.get(:default_language, "en")