diff --git a/assessments/semiprimes/server/lib/extras.ex b/assessments/semiprimes/server/lib/extras.ex
index 4d2a938fc..f0c2ea4b9 100644
--- a/assessments/semiprimes/server/lib/extras.ex
+++ b/assessments/semiprimes/server/lib/extras.ex
@@ -1,4 +1,8 @@
 defmodule Extras do
+  @moduledoc """
+  Hosts utility functions intended to supplement the standard library.
+  """
+
   @doc """
   Return an ascending range starting at `a` and ending at `b` (exclusive).