diff --git a/src/purchase/views/reports.py b/src/purchase/views/reports.py
index 2e4ab34..fcb51e4 100644
--- a/src/purchase/views/reports.py
+++ b/src/purchase/views/reports.py
@@ -2,6 +2,7 @@ import datetime
 from io import StringIO
 from zoneinfo import ZoneInfo
 
+import matplotlib
 import numpy as np
 from django.conf import settings
 from django.contrib import messages
@@ -17,6 +18,8 @@ from matplotlib.figure import Figure
 
 from purchase.models import Basket, PaymentMethod, Product, ProductQuerySet
 
+matplotlib.use("TkAgg")
+
 
 @permission_required("purchase.view_basket")
 def reports(request):