diff --git a/aleksis/apps/matrix/model_extensions.py b/aleksis/apps/matrix/model_extensions.py
new file mode 100644
index 0000000000000000000000000000000000000000..70753101ed9a6a7997802a889876c2c6886bb1a9
--- /dev/null
+++ b/aleksis/apps/matrix/model_extensions.py
@@ -0,0 +1,9 @@
+from django.utils.translation import gettext_lazy as _
+
+from jsonstore import CharField
+
+from aleksis.core.models import Group, Person
+
+
+Person.field(matrix_id=CharField(verbose_name=_("Matrix ID")))
+Group.field(matrix_room_id=CharField(verbose_name=_("Matrix room ID")))