diff --git a/system/Validation/Rules.php b/system/Validation/Rules.php
index aba9ff117df6..04e7f0771c17 100644
--- a/system/Validation/Rules.php
+++ b/system/Validation/Rules.php
@@ -209,7 +209,7 @@ public function not_in_list(?string $value, string $list): bool
     }
 
     /**
-     * @param mixed $str
+     * @param array|bool|float|int|object|string|null $str
      */
     public function required($str = null): bool
     {
diff --git a/system/Validation/Validation.php b/system/Validation/Validation.php
index 29a9bee54958..8537ed602f6f 100644
--- a/system/Validation/Validation.php
+++ b/system/Validation/Validation.php
@@ -183,8 +183,8 @@ public function run(?array $data = null, ?string $group = null, ?string $dbGroup
      * Runs the validation process, returning true or false
      * determining whether validation was successful or not.
      *
-     * @param mixed    $value
-     * @param string[] $errors
+     * @param array|bool|float|int|object|string|null $value
+     * @param string[]                                $errors
      */
     public function check($value, string $rule, array $errors = []): bool
     {
diff --git a/system/Validation/ValidationInterface.php b/system/Validation/ValidationInterface.php
index dc0679a3e328..5e568d4a4914 100644
--- a/system/Validation/ValidationInterface.php
+++ b/system/Validation/ValidationInterface.php
@@ -31,9 +31,8 @@ public function run(?array $data = null, ?string $group = null): bool;
      * Check; runs the validation process, returning true or false
      * determining whether or not validation was successful.
      *
-     * @param mixed    $value  Value to validation.
-     * @param string   $rule   Rule.
-     * @param string[] $errors Errors.
+     * @param array|bool|float|int|object|string|null $value  Value to validate.
+     * @param string[]                                $errors
      *
      * @return bool True if valid, else false.
      */