diff --git a/config/utilities.php b/config/utilities.php
index 7e021dd..0d7ce10 100644
--- a/config/utilities.php
+++ b/config/utilities.php
@@ -3,10 +3,26 @@
 // config for PropaySystems/Utilities
 return [
 
+    /*
+    |--------------------------------------------------------------------------
+    | Translation Helper
+    |--------------------------------------------------------------------------
+    |
+    | Set the default path for the translation files
+    |
+    */
     'translation_helper' => [
         'path' => env('TRANSLATION_HELPER_PATH', 'db'),
     ],
 
+    /*
+    |--------------------------------------------------------------------------
+    | Save To Upper
+    |--------------------------------------------------------------------------
+    |
+    | Exclude fields when converting to uppercase
+    |
+    */
     'save_to_upper' => [
         'exclusions' => [
             'email',
@@ -19,8 +35,30 @@
         ],
     ],
 
+    /*
+    |--------------------------------------------------------------------------
+    | Trigger
+    |--------------------------------------------------------------------------
+    |
+    | Enable or disable database triggers
+    |
+    */
     'trigger' => [
         'enable_trigger' => env('ENABLE_TRIGGER', false),
     ],
 
+    /*
+    |--------------------------------------------------------------------------
+    | Gender Code
+    |--------------------------------------------------------------------------
+    |
+    | This gender code is used mostly in the id number helper.
+    |
+    */
+    'gender' => [
+        'male' => 1,
+        'female' => 2,
+        'unknown' => 3,
+    ],
+
 ];
diff --git a/src/Helpers/IdNumberHelper.php b/src/Helpers/IdNumberHelper.php
index e493a4d..a677bbd 100644
--- a/src/Helpers/IdNumberHelper.php
+++ b/src/Helpers/IdNumberHelper.php
@@ -86,7 +86,7 @@ public static function generateFakeId(): string
         $totalMod = ($total % 10);
         $lastDigit = 10 - $totalMod;
 
-        return Str::limit($tempId.$lastDigit, 13);
+        return Str::limit($tempId.$lastDigit, 13, '');
     }
 
     public static function generateDateOfBirth(): string
@@ -99,9 +99,9 @@ public static function generateDateOfBirth(): string
         );
     }
 
-    public static function getGenderCode($idNumber): string
+    public static function getGenderCode($idNumber): int
     {
-        return (substr($idNumber, 6, 4) < 5000) ? 'female' : 'male';
+        return (substr($idNumber, 6, 4) < 5000) ? config('utilities.gender.female') : config('utilities.gender.male');
     }
 
     public static function getBirthDate($idNumber): string
@@ -111,8 +111,6 @@ public static function getBirthDate($idNumber): string
         $birthYear = substr($idNumber, 0, 2);
         if ($birthYear < date('y')) {
             $default_century = '20';
-        } else {
-            $default_century = '19';
         }
 
         $year = $default_century.substr($idNumber, 0, 2);