diff --git a/biscuit/apps/chronos/migrations/0003_lesson_substitution.py b/biscuit/apps/chronos/migrations/0003_lesson_substitution.py
new file mode 100644
index 0000000000000000000000000000000000000000..d2bab865e852396e2ea1910ee640179781a113dc
--- /dev/null
+++ b/biscuit/apps/chronos/migrations/0003_lesson_substitution.py
@@ -0,0 +1,29 @@
+# Generated by Django 2.2.4 on 2019-08-21 14:18
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0013_person_primary_group'),
+        ('chronos', '0002_make_unique'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='LessonSubstitution',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('room', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='chronos.Room')),
+                ('subject', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='lesson_substitutions', to='chronos.Subject')),
+                ('teachers', models.ManyToManyField(related_name='lesson_substitutions', to='core.Person')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='lessonperiod',
+            name='substitution',
+            field=models.OneToOneField(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='lesson_period', to='chronos.LessonSubstitution'),
+        ),
+    ]