diff --git a/config/geocoder.php b/config/geocoder.php
index 7049d01..03b8b44 100644
--- a/config/geocoder.php
+++ b/config/geocoder.php
@@ -96,6 +96,14 @@
     |
     | Default: null
     |
+    | Example:
+    |   'reader' => [
+    |       WebService::class => [
+    |           env('MAXMIND_USER_ID'),
+    |           env('MAXMIND_LICENSE_KEY')
+    |       ],
+    |   ],
+    |
     */
     'reader' => null,
 
diff --git a/phpmd.xml b/phpmd.xml
new file mode 100644
index 0000000..e69de29
diff --git a/src/ProviderAndDumperAggregator.php b/src/ProviderAndDumperAggregator.php
index 62fe04a..9a17334 100644
--- a/src/ProviderAndDumperAggregator.php
+++ b/src/ProviderAndDumperAggregator.php
@@ -223,11 +223,13 @@ protected function getAdapterClass(string $provider) : string
 
     protected function getReader()
     {
+        $reader = config('geocoder.reader');
+
         if (is_array(config('geocoder.reader'))) {
-            $reflection = new ReflectionClass(config('geocoder.reader.class'));
-            $reader = $reflection->newInstanceArgs(config('geocoder.reader.arguments'));
-        } else {
-            $reader = config('geocoder.reader');
+            $readerClass = array_key_first(config('geocoder.reader'));
+            $readerArguments = config('geocoder.reader')[$readerClass];
+            $reflection = new ReflectionClass($readerClass);
+            $reader = $reflection->newInstanceArgs($readerArguments);
         }
 
         return $reader;
diff --git a/tests/config/testConfig.php b/tests/config/testConfig.php
index 1b752de..9ee6af6 100644
--- a/tests/config/testConfig.php
+++ b/tests/config/testConfig.php
@@ -38,5 +38,10 @@
         ],
     ],
     'adapter'  => Client::class,
-    'reader' => new Reader(__DIR__ . '/../resources/assets/GeoLite2-City.mmdb'),
+    // 'reader' => new Reader(__DIR__ . '/../resources/assets/GeoLite2-City.mmdb'),
+    "reader" => [
+        Reader::class => [
+            __DIR__ . '/../resources/assets/GeoLite2-City.mmdb',
+        ],
+    ],
 ];