diff --git a/pretalx_musicrate/__init__.py b/pretalx_musicrate/__init__.py
index 7d81849..d386132 100644
--- a/pretalx_musicrate/__init__.py
+++ b/pretalx_musicrate/__init__.py
@@ -1 +1 @@
-__version__ = "2025.4.1"
+__version__ = "2025.5.0.dev0"
diff --git a/pretalx_musicrate/management/commands/computescores.py b/pretalx_musicrate/management/commands/computescores.py
index 0f057de..aaa5ef2 100644
--- a/pretalx_musicrate/management/commands/computescores.py
+++ b/pretalx_musicrate/management/commands/computescores.py
@@ -31,8 +31,10 @@ class Command(BaseCommand):
         with scope(event=event):
             submissions = {}
 
-            for juror in event.jurors.prefetch_related("ratings__submission").order_by(
-                "token"
+            for juror in (
+                event.jurors.prefetch_related("ratings__submission")
+                .filter(frozen=False)
+                .order_by("token")
             ):
                 ratings = list(
                     juror.ratings.exclude(rating="").order_by("submission__created")
diff --git a/pretalx_musicrate/migrations/0010_juror_frozen.py b/pretalx_musicrate/migrations/0010_juror_frozen.py
new file mode 100644
index 0000000..415b878
--- /dev/null
+++ b/pretalx_musicrate/migrations/0010_juror_frozen.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.1.5 on 2025-02-23 13:27
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretalx_musicrate", "0009_score"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="juror",
+            name="frozen",
+            field=models.BooleanField(default=False),
+        ),
+    ]
diff --git a/pretalx_musicrate/models.py b/pretalx_musicrate/models.py
index d71d0b4..a045982 100644
--- a/pretalx_musicrate/models.py
+++ b/pretalx_musicrate/models.py
@@ -78,6 +78,7 @@ class Juror(models.Model):
         related_name="jurors",
         null=True,
     )
+    frozen = models.BooleanField(default=False)
 
 
 class Rating(models.Model):
diff --git a/pretalx_musicrate/views.py b/pretalx_musicrate/views.py
index 0a3d9ea..6c471ad 100644
--- a/pretalx_musicrate/views.py
+++ b/pretalx_musicrate/views.py
@@ -54,7 +54,7 @@ class JoinView(TemplateView):
 
     def validate_token(self, token):
         try:
-            self.juror = Juror.objects.get(token=token)
+            self.juror = Juror.objects.get(token=token, frozen=False)
             return True
         except Juror.DoesNotExist:
             self.juror = None
@@ -256,7 +256,7 @@ class RatingView(FormView, SubmissionMixin):
     @cached_property
     def juror(self):
         return get_object_or_404(
-            Juror, token=self.request.resolver_match.kwargs["token"]
+            Juror, token=self.request.resolver_match.kwargs["token"], frozen=False
         )
 
     @context
@@ -384,8 +384,8 @@ class MayAdvanceView(EventPermissionRequired, SubmissionMixin, View):
     permission_required = "orga.view_submissions"
 
     def get(self, request, *args, **kwargs):
-        num_ratings = self.submission.ratings.count()
-        num_jurors = self.request.event.jurors.count()
+        num_ratings = self.submission.ratings.filter(juror__frozen=False).count()
+        num_jurors = self.request.event.jurors.filter(frozen=False).count()
         return JsonResponse(
             {
                 "mayAdvance": num_ratings
@@ -417,7 +417,7 @@ class ExportView(EventPermissionRequired, View):
         writer = csv.writer(response)
         genre_question = request.event.pretalx_musicrate_settings.genre_question
         origin_question = request.event.pretalx_musicrate_settings.origin_question
-        jurors = request.event.jurors.order_by("token")
+        jurors = request.event.jurors.filter(frozen=False).order_by("token")
         for submission in (
             request.event.submissions.prefetch_related("answers")
             .select_related("submission_type")