diff --git a/aleksis/apps/alsijil/migrations/0003_extra_mark.py b/aleksis/apps/alsijil/migrations/0003_extra_mark.py
index 307d9168a296661c8b520b55a1b5cd400b5e6df3..9f8d658c2668e7fcc7598320d1d99161527a0699 100644
--- a/aleksis/apps/alsijil/migrations/0003_extra_mark.py
+++ b/aleksis/apps/alsijil/migrations/0003_extra_mark.py
@@ -64,7 +64,6 @@ class Migration(migrations.Migration):
             name="extra_marks",
             field=models.ManyToManyField(
                 blank=True,
-                null=True,
                 to="alsijil.ExtraMark",
                 verbose_name="Extra marks",
             ),
diff --git a/aleksis/apps/alsijil/models.py b/aleksis/apps/alsijil/models.py
index dc92c009fcb7fa2e40d90e66f0878bdee552b61e..3102329858671792d55ea193add494b1584a7500 100644
--- a/aleksis/apps/alsijil/models.py
+++ b/aleksis/apps/alsijil/models.py
@@ -81,9 +81,7 @@ class PersonalNote(ExtensibleModel, WeekRelatedMixin):
 
     remarks = models.CharField(max_length=200, blank=True)
 
-    extra_marks = models.ManyToManyField(
-        "ExtraMark", null=True, blank=True, verbose_name=_("Extra marks")
-    )
+    extra_marks = models.ManyToManyField("ExtraMark", blank=True, verbose_name=_("Extra marks"))
 
     def save(self, *args, **kwargs):
         if self.excuse_type: