diff --git a/pandora_client/__init__.py b/pandora_client/__init__.py
index 76baa93..be4aabc 100755
--- a/pandora_client/__init__.py
+++ b/pandora_client/__init__.py
@@ -33,7 +33,7 @@ socket.setdefaulttimeout(300)
 CHUNK_SIZE = 1024*1024*5
 default_media_cache = os.environ.get('oxMEDIA', os.path.join(utils.basedir(), 'media'))
 
-DOCUMENT_FORMATS = ('jpg', 'pdf', 'png', 'webp', 'avif', 'heic', 'heif')
+DOCUMENT_FORMATS = ('jpg', 'pdf', 'png', 'webp', 'avif', 'heic', 'heif', 'tiff')
 sync_extensions = ()
 
 def get_frames(filename, prefix, info, force=False):