diff --git a/config/packages/liip_imagine.yaml b/config/packages/liip_imagine.yaml
index 7c037799..a928c350 100644
--- a/config/packages/liip_imagine.yaml
+++ b/config/packages/liip_imagine.yaml
@@ -17,4 +17,4 @@ liip_imagine:
       quality: 100
       filters:
         relative_resize:
-          widen: 400
\ No newline at end of file
+          widen: 600
\ No newline at end of file
diff --git a/src/Service/BookFileSystemManager.php b/src/Service/BookFileSystemManager.php
index 7f7d813d..7c062602 100644
--- a/src/Service/BookFileSystemManager.php
+++ b/src/Service/BookFileSystemManager.php
@@ -18,7 +18,7 @@ class BookFileSystemManager
         '*.epub', '*.cbr', '*.cbz', '*.pdf', '*.mobi',
     ];
 
-    public const VALID_COVER_EXTENSIONS = ['jpg', 'jpeg', 'png', 'gif'];
+    public const VALID_COVER_EXTENSIONS = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
 
     public function __construct(private KernelInterface $appKernel, private SluggerInterface $slugger, private LoggerInterface $logger)
     {