diff --git a/examples/openid.php b/examples/openid.php
index 91ce8406f0..bfe30da397 100644
--- a/examples/openid.php
+++ b/examples/openid.php
@@ -33,7 +33,7 @@ $authMap = ['https://launchpad.net/~username' => ['user' => 'root', 'password' =
  *
  * @param string $contents Content to include in page
  */
-function Show_page($contents): void
+function Show_page(string $contents): void
 {
     header('Content-Type: text/html; charset=utf-8');
 
@@ -62,7 +62,7 @@ function Show_page($contents): void
  *
  * @param Exception $e Exception object
  */
-function Die_error($e): void
+function Die_error(Throwable $e): void
 {
     $contents = "<div class='relyingparty_results'>\n";
     $contents .= '<pre>' . htmlspecialchars($e->getMessage()) . "</pre>\n";
diff --git a/examples/signon-script.php b/examples/signon-script.php
index 0b27a0bbcf..6688fd68aa 100644
--- a/examples/signon-script.php
+++ b/examples/signon-script.php
@@ -20,7 +20,7 @@ declare(strict_types=1);
  *
  * @return array<int,string>
  */
-function get_login_credentials($user): array
+function get_login_credentials(string $user): array
 {
     /* Optionally we can use passed username */
     if (! empty($user)) {
diff --git a/libraries/classes/Pdf.php b/libraries/classes/Pdf.php
index 67869b469c..b76e7dca20 100644
--- a/libraries/classes/Pdf.php
+++ b/libraries/classes/Pdf.php
@@ -130,7 +130,7 @@ class Pdf extends TCPDF
      * @param string $errorMessage the error message
      */
     // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps
-    public function Error($errorMessage = ''): void
+    public function Error(mixed $errorMessage = ''): void
     {
         echo Message::error(
             __('Error while creating PDF:') . ' ' . $errorMessage,
diff --git a/libraries/classes/Plugins/Export/Helpers/Pdf.php b/libraries/classes/Plugins/Export/Helpers/Pdf.php
index 3f8048beb2..08676eb1a2 100644
--- a/libraries/classes/Plugins/Export/Helpers/Pdf.php
+++ b/libraries/classes/Plugins/Export/Helpers/Pdf.php
@@ -103,7 +103,7 @@ class Pdf extends PdfLib
      * @param bool      $addpage if true add a page, otherwise only return
      *                           the true/false state
      */
-    public function checkPageBreak($h = 0, $y = '', $addpage = true): bool
+    public function checkPageBreak(mixed $h = 0, mixed $y = '', mixed $addpage = true): bool
     {
         if (TCPDF_STATIC::empty_string($y)) {
             $y = $this->y;
@@ -296,7 +296,7 @@ class Pdf extends PdfLib
      *
      * @param float $topMargin the margin
      */
-    public function setTopMargin($topMargin): void
+    public function setTopMargin(mixed $topMargin): void
     {
         $this->tMargin = $topMargin;
     }
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index 45ea036b7b..9777193798 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -42,9 +42,6 @@
     <rule ref="SlevomatCodingStandard.Operators.DisallowEqualOperators">
         <severity>4</severity>
     </rule>
-    <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingNativeTypeHint">
-        <severity>4</severity>
-    </rule>
     <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingTraversableTypeHintSpecification">
         <severity>4</severity>
     </rule>