diff --git a/assets/js/pages/files.vue b/assets/js/pages/files.vue
index 84bae5e..3e80002 100644
--- a/assets/js/pages/files.vue
+++ b/assets/js/pages/files.vue
@@ -6,7 +6,6 @@
       <table class="table">
         <thead>
         <tr>
-          <th>Id</th>
           <th>File name</th>
           <th class="text-end">File size</th>
           <th>Extension</th>
@@ -16,7 +15,6 @@
         </thead>
         <tbody>
         <tr v-for="file in files">
-          <td>{{ file.id }}</td>
           <td>{{ file.fileName }}
             <p class="mb-0" v-if="file.book">
               <a class="text-decoration-none" :href="'/book/'+file.book.id">{{
diff --git a/src/Service/FileService.php b/src/Service/FileService.php
index f46ff39..5fb80cf 100644
--- a/src/Service/FileService.php
+++ b/src/Service/FileService.php
@@ -45,9 +45,13 @@ class FileService
 
     public function getFileName(File $file): string
     {
-        return 'ebook_' . $file->getBook()->getId() . '_' .
-            md5($file->getFileName()) . '.' .
-            $file->getExtension();
+        return sprintf(
+            'ebook_%d_%d_%s.%s',
+            $file->getBook()->getId(),
+            $file->getId(),
+            md5($file->getFileName()),
+            $file->getExtension()
+        );
     }
 
     /**