diff --git a/phpBB/phpbb/json/sanitizer.php b/phpBB/phpbb/json/sanitizer.php
index 101c19ae32..e9294f41cf 100644
--- a/phpBB/phpbb/json/sanitizer.php
+++ b/phpBB/phpbb/json/sanitizer.php
@@ -33,7 +33,7 @@ class sanitizer
 	{
 		if (!empty($data))
 		{
-			$json_sanitizer = function (&$value, $key) {
+			$json_sanitizer = function (&$value) {
 				$type_cast_helper = new type_cast_helper();
 				$type_cast_helper->set_var($value, $value, gettype($value), true);
 			};
diff --git a/phpBB/phpbb/language/language_file_helper.php b/phpBB/phpbb/language/language_file_helper.php
index 2a56740b6d..01604c033a 100644
--- a/phpBB/phpbb/language/language_file_helper.php
+++ b/phpBB/phpbb/language/language_file_helper.php
@@ -69,7 +69,7 @@ class language_file_helper
 	 * @param string $path
 	 * @return array
 	 */
-	public function get_language_data_from_composer_file($path)
+	public function get_language_data_from_composer_file(string $path)
 	{
 		$json_data = file_get_contents($path);
 		return $this->get_language_data_from_json(sanitizer::decode($json_data));