diff --git a/aleksis/apps/paweljong/apps.py b/aleksis/apps/paweljong/apps.py
index 45715c06c9c6c8c19c963309605f315957920a3f..2b8d76ad66a334f03e73d54dcd5a303dd807ce51 100644
--- a/aleksis/apps/paweljong/apps.py
+++ b/aleksis/apps/paweljong/apps.py
@@ -10,6 +10,4 @@ class DefaultConfig(AppConfig):
         "Repository": "https://edugit.org/Teckids/hacknfun//AlekSIS-App-Paweljong",
     }
     licence = "EUPL-1.2+"
-    copyright_info = (
-        ([2021], "Dominik George", "dominik.george@teckids.org"),
-    )
+    copyright_info = (([2021], "Dominik George", "dominik.george@teckids.org"),)
diff --git a/aleksis/apps/paweljong/menus.py b/aleksis/apps/paweljong/menus.py
index 7acd33a248e95307c86467ba9a17066829248c2e..5872a6aa1702de5882dfd225404a716baf169fc8 100644
--- a/aleksis/apps/paweljong/menus.py
+++ b/aleksis/apps/paweljong/menus.py
@@ -10,8 +10,7 @@ MENUS = {
                 "menu_generator.validators.is_authenticated",
                 "aleksis.core.util.core_helpers.has_person",
             ],
-            "submenu": [
-            ],
+            "submenu": [],
         }
     ]
 }
diff --git a/aleksis/apps/paweljong/models.py b/aleksis/apps/paweljong/models.py
index 0d73696f2d86b8040526924f07b070ecb15c9ec4..6bffa445beb832166dc939bb0e0b8c74907ba676 100644
--- a/aleksis/apps/paweljong/models.py
+++ b/aleksis/apps/paweljong/models.py
@@ -127,7 +127,10 @@ class Voucher(ExtensibleModel):
         null=True,
     )
     person = models.ForeignKey(
-        Person, related_name="vouchers", verbose_name=_("Person"), on_delete=models.CASCADE,
+        Person,
+        related_name="vouchers",
+        verbose_name=_("Person"),
+        on_delete=models.CASCADE,
     )
     discount = models.IntegerField(default=100)
 
@@ -157,13 +160,19 @@ class EventRegistration(ExtensibleModel):
     comment = models.TextField(verbose_name=_("Comment / remarks"), blank=True, default="")
     channel = models.CharField(verbose_name=_("Channel"), max_length=255, blank=True, default="")
     voucher = models.ForeignKey(
-        Voucher, on_delete=models.CASCADE, verbose_name=_("Voucher"), blank=True, null=True,
+        Voucher,
+        on_delete=models.CASCADE,
+        verbose_name=_("Voucher"),
+        blank=True,
+        null=True,
     )
     donation = models.PositiveIntegerField(verbose_name=_("Donation"), blank=True, null=True)
 
     accept_sepa = models.BooleanField(verbose_name=_("SEPA direct debit"))
     iban = IBANField(
-        verbose_name=_("IBAN (for SEPA direct debit)"), enforce_database_constraint=True, null=True,
+        verbose_name=_("IBAN (for SEPA direct debit)"),
+        enforce_database_constraint=True,
+        null=True,
     )
 
     accept_terms = models.BooleanField(verbose_name=_("Delcaration of consent by parents"))