diff --git a/netbox/circuits/__init__.py b/netbox/circuits/__init__.py
index e69de29bb..e5400337f 100644
--- a/netbox/circuits/__init__.py
+++ b/netbox/circuits/__init__.py
@@ -0,0 +1 @@
+default_app_config = 'circuits.apps.CircuitsConfig'
diff --git a/netbox/circuits/apps.py b/netbox/circuits/apps.py
new file mode 100644
index 000000000..bc0b7d87d
--- /dev/null
+++ b/netbox/circuits/apps.py
@@ -0,0 +1,9 @@
+from django.apps import AppConfig
+
+
+class CircuitsConfig(AppConfig):
+    name = "circuits"
+    verbose_name = "Circuits"
+
+    def ready(self):
+        import circuits.signals
diff --git a/netbox/circuits/signals.py b/netbox/circuits/signals.py
new file mode 100644
index 000000000..bdfe8c0b6
--- /dev/null
+++ b/netbox/circuits/signals.py
@@ -0,0 +1,13 @@
+from django.db.models.signals import post_delete, post_save
+from django.dispatch import receiver
+from django.utils import timezone
+
+from .models import Circuit, CircuitTermination
+
+
+@receiver((post_save, post_delete), sender=CircuitTermination)
+def update_circuit(instance, **kwargs):
+    """
+    When a CircuitTermination has been modified, update the last_updated time of its parent Circuit.
+    """
+    Circuit.objects.filter(pk=instance.circuit_id).update(last_updated=timezone.now())