diff --git a/lib/Db/BookmarkMapper.php b/lib/Db/BookmarkMapper.php
index c7f5c7a..c8a26c3 100644
--- a/lib/Db/BookmarkMapper.php
+++ b/lib/Db/BookmarkMapper.php
@@ -36,21 +36,24 @@ class BookmarkMapper extends ReaderMapper {
      * @param string $name
      * @return array
      */
-    public function get($fileId, $name, $type=null) {
-        $sql = "SELECT * FROM `*PREFIX*reader_bookmarks` WHERE file_id=? AND `user_id`=?";
-        $args = [ $fileId, $this->userId ];
-        if (!(null === $type)) {
-            $sql .= " AND `type`=?";
-            $args[] = $type;
-        }
-        if (!(null === $name)) {
-            $sql .= " AND `name`=?";
-            $args[] = $name;
-        }
+	public function get($fileId, $name, $type = null) {
+    $query = $this->db->getQueryBuilder();
+    $query->select('*')
+        ->from($this->getTableName())
+        ->where($query->expr()->eq('file_id', $query->createNamedParameter($fileId)))
+        ->andWhere($query->expr()->eq('user_id', $query->createNamedParameter($this->userId)));
 
-        return $this->findEntities($sql, $args);
+    if ($type !== null) {
+        $query->andWhere($query->expr()->eq('type', $query->createNamedParameter($type)));
     }
 
+    if ($name !== null) {
+        $query->andWhere($query->expr()->eq('name', $query->createNamedParameter($name)));
+    }
+
+    return $this->findEntities($query);
+}
+
     /**
      * @brief write bookmark to database
      *