diff --git a/config/test.exs b/config/test.exs
index afe2b54..71773df 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -6,3 +6,7 @@ config :meandro,
   other_unused_option: "value3",
   input_key_option: :ok,
   nice_option: :nice
+
+config :meandro, MeandroTest.UnusedConfigurationOptions.Module,
+  used_keyed_option: "value1",
+  unused_keyed_option: "value2"
diff --git a/lib/meandro/rules/unused_configuration_options.ex b/lib/meandro/rules/unused_configuration_options.ex
index f225db3..fd0d827 100644
--- a/lib/meandro/rules/unused_configuration_options.ex
+++ b/lib/meandro/rules/unused_configuration_options.ex
@@ -47,7 +47,12 @@ defmodule Meandro.Rule.UnusedConfigurationOptions do
   end
 
   defp analyze_asts(asts, app_name, mix_env) do
-    options_set = app_name |> Application.get_all_env() |> Keyword.keys() |> Enum.sort()
+    options_set =
+      app_name
+      |> Application.get_all_env()
+      |> Keyword.keys()
+      |> maybe_aggregate_options(app_name)
+      |> Enum.sort()
 
     usage_map =
       Enum.reduce(asts, %{get_all_env: false, used_options: MapSet.new()}, fn ast, acc ->
@@ -64,6 +69,22 @@ defmodule Meandro.Rule.UnusedConfigurationOptions do
     end
   end
 
+  # This covers cases where using the macro config/3
+  # config(root_key, key, opts) so, `options` here is a root_key
+  defp maybe_aggregate_options(options, app_name) do
+    Enum.reduce(options, [], fn option, acc ->
+      key = Application.get_env(app_name, option)
+
+      case Keyword.keyword?(key) do
+        true ->
+          [Keyword.keys(key) | acc] |> List.flatten()
+
+        false ->
+          [option | acc]
+      end
+    end)
+  end
+
   defp analyze_ast(ast, acc0, app_name) do
     {_, usage_map} =
       Macro.prewalk(ast, acc0, fn node, acc ->
diff --git a/test/rules/unused_configuration_options/examples/module.exs b/test/rules/unused_configuration_options/examples/module.exs
index 7513a96..b18b5a2 100644
--- a/test/rules/unused_configuration_options/examples/module.exs
+++ b/test/rules/unused_configuration_options/examples/module.exs
@@ -1,18 +1,20 @@
 defmodule MeandroTest.UnusedConfigurationOptions.Module do
   # a function that returns a config option
   def some_fun() do
-    Application.get_env(:meandro, used_option)
+    Application.get_env(:meandro, :used_option)
     other_fun(Application.fetch_env!(:meandro, :input_key_option))
   end
 
   def other_fun(key) do
     [
       key,
-      Application.fetch_env(:meandro, nice_option),
+      Application.fetch_env(:meandro, :nice_option),
       # calls get_all_env from other app -> ignore it!
       Application.get_all_env(:other_app),
       # calls to an unused option but from other app -> ignore it!
-      Application.fetch_env(:other_app, unused_option)
+      Application.fetch_env(:other_app, :unused_option),
+      # uses a keyed option also
+      Application.get_env(:meandro, :used_keyed_option)
     ]
   end
 end
diff --git a/test/rules/unused_configuration_options/unused_configuration_options_test.exs b/test/rules/unused_configuration_options/unused_configuration_options_test.exs
index c0f76d0..64d9153 100644
--- a/test/rules/unused_configuration_options/unused_configuration_options_test.exs
+++ b/test/rules/unused_configuration_options/unused_configuration_options_test.exs
@@ -10,26 +10,30 @@ defmodule MeandroTest.Rule.UnusedConfigurationOptions do
     file = @test_directory_path <> "module.exs"
     files_and_asts = TestHelpers.parse_files([file])
 
-    expected_text1 =
-      "Configuration option :other_unused_option (MIX_ENV=test) is not used anywhere in the code"
-
-    expected_text2 =
-      "Configuration option :unused_option (MIX_ENV=test) is not used anywhere in the code"
-
     assert [
              %Rule{
                file: nil,
                line: 0,
                pattern: :other_unused_option,
                rule: UnusedConfigurationOptions,
-               text: ^expected_text1
+               text:
+                 "Configuration option :other_unused_option (MIX_ENV=test) is not used anywhere in the code"
+             },
+             %Rule{
+               file: nil,
+               line: 0,
+               pattern: :unused_keyed_option,
+               rule: UnusedConfigurationOptions,
+               text:
+                 "Configuration option :unused_keyed_option (MIX_ENV=test) is not used anywhere in the code"
              },
              %Rule{
                file: nil,
                line: 0,
                pattern: :unused_option,
                rule: UnusedConfigurationOptions,
-               text: ^expected_text2
+               text:
+                 "Configuration option :unused_option (MIX_ENV=test) is not used anywhere in the code"
              }
            ] =
              Rule.analyze(UnusedConfigurationOptions, files_and_asts,