Temporarily work around pypdf bug py-pdf/pypdf#1640

src/pretix/plugins/badges/exporters.py

@@ -51,8 +51,8 @@ from django.db.models import Exists, OuterRef, Q, Subquery
 from django.db.models.functions import Cast, Coalesce
 from django.utils.timezone import make_aware
 from django.utils.translation import gettext as _, gettext_lazy, pgettext_lazy
-from pypdf import PdfMerger, PdfReader, PdfWriter, Transformation
-from pypdf.generic import RectangleObject
+from PyPDF2 import PdfMerger, PdfReader, PdfWriter, Transformation
+from PyPDF2.generic import RectangleObject
 from reportlab.lib import pagesizes
 from reportlab.lib.units import mm
 from reportlab.pdfgen import canvas

src/setup.py

@@ -212,6 +212,7 @@ setup(
         'pycountry',
         'pycparser==2.21',
         'pycryptodome==3.17.*',
+        'PyPDF2==2.12.*',   # until https://github.com/py-pdf/pypdf/issues/1640 is fixed
         'pypdf==3.4.*',
         'python-bidi==0.4.*',  # Support for Arabic in reportlab
         'python-dateutil==2.8.*',