diff --git a/pms/signals.py b/pms/signals.py
index 3878ebdd5..eff6c5432 100644
--- a/pms/signals.py
+++ b/pms/signals.py
@@ -82,7 +82,9 @@ def start_automation():
                     """
                     if type == "ManyToManyField":
 
-                        @receiver(m2m_changed, sender=model_class.members.through)
+                        @receiver(
+                            m2m_changed, sender=getattr(model_class, field).through
+                        )
                         def members_changed(sender, instance, action, **kwargs):
                             """
                             Handle m2m_changed signal for the members field in YourModel.