--- frescobaldi-3.1.3/frescobaldi_app/qpageview/shadow.py.orig	2021-10-22 11:18:50.427497680 -0500
+++ frescobaldi-3.1.3/frescobaldi_app/qpageview/shadow.py	2021-10-22 11:17:11.795956469 -0500
@@ -40,7 +40,7 @@
             width = self._pageLayout.spacing / 2
             # make the rect slightly larger, so we "see" shadow of pages that
             # would be outside view normally.
-            rect = ev.rect().adjusted(-width, -width, width / 2, width / 2)
+            rect = ev.rect().adjusted(int(-width), int(-width), int(width / 2), int(width / 2))
             painter = QPainter(self.viewport())
             for page, rect in self.pagesToPaint(rect, painter):
                 self.drawDropShadow(page, painter, width)