diff --git a/action/prosemirror.php b/action/prosemirror.php
index e045833..074c836 100644
--- a/action/prosemirror.php
+++ b/action/prosemirror.php
@@ -49,9 +49,7 @@ public function writeDefaultsToJSINFO(Event $event, $param)
             $JSINFO['plugins'] = [];
         }
         $JSINFO['plugins']['gallery'] = [
-            'defaults' => array_map(function ($default) {
-                return ['default' => $default,];
-            }, $defaults),
+            'defaults' => array_map(static fn($default) => ['default' => $default,], $defaults),
         ];
         $JSINFO['plugins']['gallery']['defaults']['namespace'] = ['default' => ''];
     }
diff --git a/classes/AbstractGallery.php b/classes/AbstractGallery.php
index f238fe9..64f6b34 100644
--- a/classes/AbstractGallery.php
+++ b/classes/AbstractGallery.php
@@ -46,24 +46,16 @@ public function getImages()
 
         switch ($this->options->sort) {
             case Options::SORT_FILE:
-                usort($images, function ($a, $b) {
-                    return Sort::strcmp($a->getFilename(), $b->getFilename());
-                });
+                usort($images, static fn($a, $b) => Sort::strcmp($a->getFilename(), $b->getFilename()));
                 break;
             case Options::SORT_CTIME:
-                usort($images, function ($a, $b) {
-                    return $a->getCreated() - $b->getCreated();
-                });
+                usort($images, static fn($a, $b) => $a->getCreated() - $b->getCreated());
                 break;
             case Options::SORT_MTIME:
-                usort($images, function ($a, $b) {
-                    return $a->getModified() - $b->getModified();
-                });
+                usort($images, static fn($a, $b) => $a->getModified() - $b->getModified());
                 break;
             case Options::SORT_TITLE:
-                usort($images, function ($a, $b) {
-                    return Sort::strcmp($a->getTitle(), $b->getTitle());
-                });
+                usort($images, static fn($a, $b) => Sort::strcmp($a->getTitle(), $b->getTitle()));
                 break;
             case Options::SORT_RANDOM:
                 shuffle($images);