diff --git a/core/imageboard/image.php b/core/imageboard/image.php
index d1286a99..6ae686ed 100644
--- a/core/imageboard/image.php
+++ b/core/imageboard/image.php
@@ -22,7 +22,7 @@ class Image
     private string $ext;
     private string $mime;
 
-    /** @var string[]|null */
+    /** @var ?string[] */
     public ?array $tag_array;
     public int $owner_id;
     public string $owner_ip;
diff --git a/ext/media/main.php b/ext/media/main.php
index 2ef88c17..9090095f 100644
--- a/ext/media/main.php
+++ b/ext/media/main.php
@@ -631,7 +631,7 @@ class Media extends Extension
      * @param int $new_width
      * @param int $new_height
      * @param string $output_filename
-     * @param string|null $output_mime If set to null, the output file type will be automatically determined via the $info parameter. Otherwise an exception will be thrown.
+     * @param ?string $output_mime If set to null, the output file type will be automatically determined via the $info parameter. Otherwise an exception will be thrown.
      * @param int $output_quality Defaults to 80.
      * @throws MediaException
      * @throws InsufficientMemoryException if the estimated memory usage exceeds the memory limit.
@@ -642,7 +642,7 @@ class Media extends Extension
         int $new_width,
         int $new_height,
         string $output_filename,
-        string $output_mime = null,
+        ?string $output_mime = null,
         string $alpha_color = Media::DEFAULT_ALPHA_CONVERSION_COLOR,
         string $resize_type = self::RESIZE_TYPE_FIT,
         int $output_quality = 80,