diff --git a/tasks/admin.py b/tasks/admin.py
index 8d714d4..46ea8a5 100644
--- a/tasks/admin.py
+++ b/tasks/admin.py
@@ -6,14 +6,17 @@ from .models import Tool, Task, Event, GroupTaskSubscription, GroupToolSubscript
 
 class GroupTaskSubscriptionInline(admin.TabularInline):
     model = GroupTaskSubscription
+    extra = 0
 
 
 class GroupToolSubscriptionInline(admin.TabularInline):
     model = GroupToolSubscription
+    extra = 0
 
 
 class EventInline(admin.TabularInline):
     model = Event
+    extra = 0
 
 
 @admin.register(Task)