diff --git a/src/MD_STD_IN.php b/src/MD_STD_IN.php
index 572ba7f..e0e0c83 100644
--- a/src/MD_STD_IN.php
+++ b/src/MD_STD_IN.php
@@ -230,22 +230,28 @@ final class MD_STD_IN {
 
     /**
      * Validates a password (minimum requirements: 8 characters, including
-     * one number and one special char).
+     * one number and one special char) and returns a list of errors,
+     * if there are any.
      *
      * @param string $input Input string.
      *
-     * @return boolean
+     * @return array<string>
      */
-    public static function validate_password(string $input):bool {
+    public static function validate_password(string $input):array {
 
+        $errors = [];
         if (mb_strlen($input) < 8) {
-            return false;
+            $errors[] = 'password_too_short';
         }
 
-        if ((\preg_match('@[0-9]@', $input)) === false) return false;
-        if ((\preg_match('@[^\w]@', $input)) === false) return false;
+        if ((\preg_match('@[0-9]@', $input)) === false) {
+            $errors[] = 'password_has_no_number';
+        }
+        if ((\preg_match('@[^\w]@', $input)) === false) {
+            $errors[] = 'password_has_no_special_char';
+        }
 
-        return true;
+        return $errors;
 
     }