diff --git a/cista/preview.py b/cista/preview.py
index 2b20a97..23580bf 100644
--- a/cista/preview.py
+++ b/cista/preview.py
@@ -18,7 +18,7 @@ from sanic.log import logger
 from cista import config
 from cista.util.filename import sanitize
 
-DISPLAYMATRIX = av.streams.SideData.DISPLAYMATRIX
+DISPLAYMATRIX = av.stream.SideData.DISPLAYMATRIX
 
 bp = Blueprint("preview", url_prefix="/preview")