diff --git a/lib/appsignal_phoenix/event_handler.ex b/lib/appsignal_phoenix/event_handler.ex
index 9dfbbff..e3b0653 100644
--- a/lib/appsignal_phoenix/event_handler.ex
+++ b/lib/appsignal_phoenix/event_handler.ex
@@ -127,7 +127,6 @@ defmodule Appsignal.Phoenix.EventHandler do
     |> @span.set_sample_data_if_nil("environment", appsignal_metadata)
     |> @span.set_sample_data_if_nil("session_data", Appsignal.Metadata.session(conn))
     |> @span.set_sample_data("metadata", %{
-      "hostname" => appsignal_metadata["host"],
       "request_method" => appsignal_metadata["method"],
       "request_path" => appsignal_metadata["request_path"],
       "request_id" => appsignal_metadata["request_id"],