diff --git a/lib/plausible/helpers/value.ex b/lib/plausible/helpers/value.ex
index 8f706bca46ec..93005005dafa 100644
--- a/lib/plausible/helpers/value.ex
+++ b/lib/plausible/helpers/value.ex
@@ -1,9 +1,13 @@
 defmodule Plausible.ValueHelpers do
+  @prefix_pattern "[a-zA-Z]+"
+  @id_pattern "\\d+"
+  @uuid_pattern "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}"
+
   @spec validate(any(), keyword()) :: any()
   def validate(value, type: :prefixed_id) when is_binary(value) do
-    prefixed_id_pattern = ~r/\A\w+-\d+\Z/
+    pattern = ~r/\A(#{@prefix_pattern})-(#{@id_pattern}|#{@uuid_pattern})\Z/
 
-    if Regex.match?(prefixed_id_pattern, value), do: value, else: nil
+    if Regex.match?(pattern, value), do: value, else: nil
   end
 
   def validate(nil, _), do: nil
diff --git a/test/plausible_web/controllers/api/external_controller_test.exs b/test/plausible_web/controllers/api/external_controller_test.exs
index 170b38302604..948e9a56ec44 100644
--- a/test/plausible_web/controllers/api/external_controller_test.exs
+++ b/test/plausible_web/controllers/api/external_controller_test.exs
@@ -502,7 +502,7 @@ defmodule PlausibleWeb.Api.ExternalControllerTest do
           company_id: 10,
           job_id: 12,
           page_id: 15,
-          product_id: "vendor-11",
+          product_id: "vendor-6a01cfb6-717a-11ee-b962-0242ac120002",
           site_id: 9,
           careers_application_form_uuid: "313a26c2-741c-421c-9a6b-f39c02c8d35c"
         }
@@ -514,7 +514,7 @@ defmodule PlausibleWeb.Api.ExternalControllerTest do
       event = get_event("special-props-test.com")
 
       assert Map.get(event, :campaign_id) == "vendor-8"
-      assert Map.get(event, :product_id) == "vendor-11"
+      assert Map.get(event, :product_id) == "vendor-6a01cfb6-717a-11ee-b962-0242ac120002"
       assert Map.get(event, :company_id) == 10
       assert Map.get(event, :job_id) == 12
       assert Map.get(event, :page_id) == 15