diff --git a/helpdesk/forms.py b/helpdesk/forms.py
index 87da3893..33501190 100644
--- a/helpdesk/forms.py
+++ b/helpdesk/forms.py
@@ -591,6 +591,12 @@ class TicketDependencyForm(forms.ModelForm):
         model = TicketDependency
         exclude = ('ticket',)
 
+    def __init__(self, ticket, *args, **kwargs):
+        super(TicketDependencyForm,self).__init__(*args, **kwargs)
+
+        # Exclude duplicate tickets, myself, existing dependencies and parents
+        self.fields['depends_on'].queryset = Ticket.objects.exclude(status=Ticket.DUPLICATE_STATUS).exclude(id=ticket.id).exclude(depends_on__ticket=ticket).exclude(ticketdependency__depends_on=ticket)
+
 class TicketResolvesForm(forms.ModelForm):
     ''' Adds this ticket as a dependency for a different ticket '''
 
@@ -599,6 +605,12 @@ class TicketResolvesForm(forms.ModelForm):
         #exclude = ('depends_on',)
         fields = ('ticket',)
 
+    def __init__(self, ticket, *args, **kwargs):
+        super(TicketResolvesForm,self).__init__(*args, **kwargs)
+
+        # Exclude duplicate tickets, myself, existing dependencies and parents
+        self.fields['ticket'].queryset = Ticket.objects.exclude(status=Ticket.DUPLICATE_STATUS).exclude(id=ticket.id).exclude(depends_on__ticket=ticket).exclude(ticketdependency__depends_on=ticket)
+
 
 class MultipleTicketSelectForm(forms.Form):
     tickets = forms.ModelMultipleChoiceField(
diff --git a/helpdesk/views/staff.py b/helpdesk/views/staff.py
index b95d6569..1d80864d 100644
--- a/helpdesk/views/staff.py
+++ b/helpdesk/views/staff.py
@@ -1672,7 +1672,7 @@ def ticket_dependency_add(request, ticket_id):
     ticket = get_object_or_404(Ticket, id=ticket_id)
     ticket_perm_check(request, ticket)
     if request.method == 'POST':
-        form = TicketDependencyForm(request.POST)
+        form = TicketDependencyForm(ticket, request.POST)
         if form.is_valid():
             ticketdependency = form.save(commit=False)
             ticketdependency.ticket = ticket
@@ -1680,7 +1680,7 @@ def ticket_dependency_add(request, ticket_id):
                 ticketdependency.save()
             return HttpResponseRedirect(reverse('helpdesk:view', args=[ticket.id]))
     else:
-        form = TicketDependencyForm()
+        form = TicketDependencyForm(ticket)
     return render(request, 'helpdesk/ticket_dependency_add.html', {
         'ticket': ticket,
         'form': form,
@@ -1708,7 +1708,7 @@ def ticket_resolves_add(request, ticket_id):
     depends_on = get_object_or_404(Ticket, id=ticket_id)
     ticket_perm_check(request, depends_on)
     if request.method == 'POST':
-        form = TicketResolvesForm(request.POST)
+        form = TicketResolvesForm(depends_on, request.POST)
         if form.is_valid():
             ticketdependency = form.save(commit=False)
             ticketdependency.depends_on = depends_on
@@ -1716,7 +1716,7 @@ def ticket_resolves_add(request, ticket_id):
                 ticketdependency.save()
             return HttpResponseRedirect(reverse('helpdesk:view', args=[depends_on.id]))
     else:
-        form = TicketResolvesForm()
+        form = TicketResolvesForm(depends_on)
     return render(request, 'helpdesk/ticket_resolves_add.html', {
         'depends_on': depends_on,
         'form': form,