diff --git a/shiftregister/signage/templatetags/qrcode.py b/shiftregister/signage/templatetags/qrcode.py
index b430ead..ed65a4f 100644
--- a/shiftregister/signage/templatetags/qrcode.py
+++ b/shiftregister/signage/templatetags/qrcode.py
@@ -5,6 +5,9 @@ from qrcode.image.svg import SvgPathFillImage
 
 register = template.Library()
 
+
 @register.simple_tag
 def qrcode(data):
-    return mark_safe(make(data, image_factory=SvgPathFillImage).to_string().decode('utf-8'))
+    return mark_safe(
+        make(data, image_factory=SvgPathFillImage).to_string().decode("utf-8")
+    )
diff --git a/shiftregister/signage/views.py b/shiftregister/signage/views.py
index c113794..b4c1578 100644
--- a/shiftregister/signage/views.py
+++ b/shiftregister/signage/views.py
@@ -3,6 +3,7 @@ from django.shortcuts import render
 from django.utils import timezone
 from .models import Helper, Shift, ShiftRegistration
 
+
 def public_dashboard(request):
     facts = []
 
@@ -10,18 +11,35 @@ def public_dashboard(request):
     if num_helpers > 0:
         facts.append(("Registrierte Helfer*innen", num_helpers))
 
-    help_wanted = Q(required_helpers__gt=F("reg_count")) | Q(required_helpers=0) & Q(room__required_helpers__gt=F("reg_count"))
+    help_wanted = Q(required_helpers__gt=F("reg_count")) | Q(required_helpers=0) & Q(
+        room__required_helpers__gt=F("reg_count")
+    )
 
-    total_work_duration = ShiftRegistration.objects.filter(state=ShiftRegistration.RegState.CHECKED_IN).aggregate(sum=Sum("shift__duration"))["sum"]
+    total_work_duration = ShiftRegistration.objects.filter(
+        state=ShiftRegistration.RegState.CHECKED_IN
+    ).aggregate(sum=Sum("shift__duration"))["sum"]
     if total_work_duration:
         total_work_duration = round(total_work_duration.total_seconds() / 60.0)
-        facts.append(("Geleistete Personenstunden", f"{total_work_duration//60}h {total_work_duration%60}min"))
+        facts.append(
+            (
+                "Geleistete Personenstunden",
+                f"{total_work_duration//60}h {total_work_duration%60}min",
+            )
+        )
 
-    num_free_shifts = Shift.with_reg_count().filter(help_wanted, deleted=False, start_at__gte=timezone.now()).count()
+    num_free_shifts = (
+        Shift.with_reg_count()
+        .filter(help_wanted, deleted=False, start_at__gte=timezone.now())
+        .count()
+    )
     if num_free_shifts > 0:
         facts.append(("Zu übernehmende Schichten", num_free_shifts))
 
-    next_free_shifts = Shift.with_reg_count().filter(help_wanted, start_at__gt=timezone.now(), deleted=False).order_by("start_at")[:4]
+    next_free_shifts = (
+        Shift.with_reg_count()
+        .filter(help_wanted, start_at__gt=timezone.now(), deleted=False)
+        .order_by("start_at")[:4]
+    )
 
     context = {"facts": facts, "next_free_shifts": next_free_shifts}
     return render(request, "public_dashboard.html", context)