diff --git a/brewman/brewman/views/messaging.py b/brewman/brewman/views/messaging.py
index 03f6bdc6..8f382a5a 100644
--- a/brewman/brewman/views/messaging.py
+++ b/brewman/brewman/views/messaging.py
@@ -100,8 +100,20 @@ def update(request):
             post = Post(content=item['Content'].strip(), date=dt, user_id=user_id)
             thread.posts.append(post)
             DBSession.add(post)
-    for subscriber in thread.subscribers:
-        subscriber.read = False
+
+    newSubscribers = request.json_body['Subscribers']
+    for i in range(len(thread.subscribers), 0, -1):
+        subscriber = thread.subscribers[i - 1]
+        if subscriber.user.name not in newSubscribers:
+            thread.subscribers.remove(subscriber)
+        else:
+            newSubscribers.remove(subscriber.name)
+            subscriber.read = False
+    for j in newSubscribers:
+        subscriber = Subscriber(user_id=User.by_name(j).id, read=False)
+        thread.subscribers.append(subscriber)
+        DBSession.add(subscriber)
+
     transaction.commit()
     return thread_info(thread.id)