diff --git a/ssmembership/jinja2/ssmembership/renew/review.html b/ssmembership/jinja2/ssmembership/renew/review.html
index ecdd011..1248170 100644
--- a/ssmembership/jinja2/ssmembership/renew/review.html
+++ b/ssmembership/jinja2/ssmembership/renew/review.html
@@ -2,7 +2,7 @@
 
 {#
     Society Self-Service
-    Copyright © 2018-2020  Yingtong Li (RunasSudo)
+    Copyright © 2018-2022  Yingtong Li (RunasSudo)
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as published by
@@ -79,32 +79,34 @@
 					<option value="1">Yes, I am an MSA member</option>
 				</select>
 			</div>
-			<div class="ui divider"></div>
-			<h2>MUMUS Mail</h2>
-			
-			<div class="ui required inline grid field">
-				<label class="three wide column">Opt-in/out</label>
-				<select id="drop_bulletin_subscribe" class="ui dropdown eleven wide column" name="bulletin_subscribe">
-					<option value="0">Do not send me MUMUS Mail (not recommended)</option>
-					<option value="1" selected>Keep me updated with MUMUS Mail</option>
-				</select>
-			</div>
-			<div class="ui inline grid field">
-				<label class="three wide column">Subscriptions</label>
-				<div class="eleven wide column">
-					{% for group in import('sspromotions.models').Group.objects.all() %}
-						{% if group.subscribable %}
-							<div class="field" style="display: inline; margin-right: 1em;">
-								<div class="ui checkbox">
-									<input type="checkbox" name="bulletin_group_{{ group.id }}" id="bulletin_group_{{ group.id }}"{% if group.contains_member(member) %} checked{% endif %}>
-									<label for="bulletin_group_{{ group.id }}">{{ group.name }}</label>
-								</div>
-							</div>
-						{% endif %}
-					{% endfor %}
-					<p style="margin-top: 0.5em;">MUMUS Mail is personalised for you. Choose the groups that you would like to see first in each edition of MUMUS Mail.</p>
+			{% if 'sspromotions' in settings.INSTALLED_APPS %}
+				<div class="ui divider"></div>
+				<h2>MUMUS Mail</h2>
+				
+				<div class="ui required inline grid field">
+					<label class="three wide column">Opt-in/out</label>
+					<select id="drop_bulletin_subscribe" class="ui dropdown eleven wide column" name="bulletin_subscribe">
+						<option value="0">Do not send me MUMUS Mail (not recommended)</option>
+						<option value="1" selected>Keep me updated with MUMUS Mail</option>
+					</select>
 				</div>
-			</div>
+				<div class="ui inline grid field">
+					<label class="three wide column">Subscriptions</label>
+					<div class="eleven wide column">
+						{% for group in import('sspromotions.models').Group.objects.all() %}
+							{% if group.subscribable %}
+								<div class="field" style="display: inline; margin-right: 1em;">
+									<div class="ui checkbox">
+										<input type="checkbox" name="bulletin_group_{{ group.id }}" id="bulletin_group_{{ group.id }}" checked>
+										<label for="bulletin_group_{{ group.id }}">{{ group.name }}</label>
+									</div>
+								</div>
+							{% endif %}
+						{% endfor %}
+						<p style="margin-top: 0.5em;">MUMUS Mail is personalised for you. Choose the groups that you would like to see first in each edition of MUMUS Mail.</p>
+					</div>
+				</div>
+			{% endif %}
 			<div class="ui divider"></div>
 			<input type="hidden" name="csrfmiddlewaretoken" value="{{ csrf_token }}">
 			<input type="hidden" name="email_orig" value="{{ email_orig }}">
diff --git a/ssmembership/jinja2/ssmembership/signup/index.html b/ssmembership/jinja2/ssmembership/signup/index.html
index 09701e7..969a630 100644
--- a/ssmembership/jinja2/ssmembership/signup/index.html
+++ b/ssmembership/jinja2/ssmembership/signup/index.html
@@ -2,7 +2,7 @@
 
 {#
     Society Self-Service
-    Copyright © 2018-2019  Yingtong Li (RunasSudo)
+    Copyright © 2018-2022  Yingtong Li (RunasSudo)
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as published by
@@ -72,32 +72,34 @@
 				<option value="1">Yes, I am an MSA member</option>
 			</select>
 		</div>
-		<div class="ui divider"></div>
-		<h2>MUMUS Mail</h2>
-		
-		<div class="ui required inline grid field">
-			<label class="three wide column">Opt-in/out</label>
-			<select id="drop_bulletin_subscribe" class="ui dropdown eleven wide column" name="bulletin_subscribe">
-				<option value="0">Do not send me MUMUS Mail (not recommended)</option>
-				<option value="1" selected>Keep me updated with MUMUS Mail</option>
-			</select>
-		</div>
-		<div class="ui inline grid field">
-			<label class="three wide column">Subscriptions</label>
-			<div class="eleven wide column">
-				{% for group in import('sspromotions.models').Group.objects.all() %}
-					{% if group.subscribable %}
-						<div class="field" style="display: inline; margin-right: 1em;">
-							<div class="ui checkbox">
-								<input type="checkbox" name="bulletin_group_{{ group.id }}" id="bulletin_group_{{ group.id }}">
-								<label for="bulletin_group_{{ group.id }}">{{ group.name }}</label>
-							</div>
-						</div>
-					{% endif %}
-				{% endfor %}
-				<p style="margin-top: 0.5em;">MUMUS Mail is personalised for you. Choose the groups that you would like to see first in each edition of MUMUS Mail.</p>
+		{% if 'sspromotions' in settings.INSTALLED_APPS %}
+			<div class="ui divider"></div>
+			<h2>MUMUS Mail</h2>
+			
+			<div class="ui required inline grid field">
+				<label class="three wide column">Opt-in/out</label>
+				<select id="drop_bulletin_subscribe" class="ui dropdown eleven wide column" name="bulletin_subscribe">
+					<option value="0">Do not send me MUMUS Mail (not recommended)</option>
+					<option value="1" selected>Keep me updated with MUMUS Mail</option>
+				</select>
 			</div>
-		</div>
+			<div class="ui inline grid field">
+				<label class="three wide column">Subscriptions</label>
+				<div class="eleven wide column">
+					{% for group in import('sspromotions.models').Group.objects.all() %}
+						{% if group.subscribable %}
+							<div class="field" style="display: inline; margin-right: 1em;">
+								<div class="ui checkbox">
+									<input type="checkbox" name="bulletin_group_{{ group.id }}" id="bulletin_group_{{ group.id }}">
+									<label for="bulletin_group_{{ group.id }}">{{ group.name }}</label>
+								</div>
+							</div>
+						{% endif %}
+					{% endfor %}
+					<p style="margin-top: 0.5em;">MUMUS Mail is personalised for you. Choose the groups that you would like to see first in each edition of MUMUS Mail.</p>
+				</div>
+			</div>
+		{% endif %}
 		<div class="ui divider"></div>
 		<input type="hidden" name="csrfmiddlewaretoken" value="{{ csrf_token }}">
 		<input class="ui primary button" type="submit" name='submit' value="Subscribe">
diff --git a/ssmembership/views.py b/ssmembership/views.py
index 8924ad5..5b60ee3 100644
--- a/ssmembership/views.py
+++ b/ssmembership/views.py
@@ -1,5 +1,5 @@
 #    Society Self-Service
-#    Copyright © 2018-2020  Yingtong Li (RunasSudo)
+#    Copyright © 2018-2022  Yingtong Li (RunasSudo)
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as published by
@@ -157,13 +157,14 @@ def renew_save(request):
 		member.save()
 		
 		# Update bulletin
-		import sspromotions.models
-		sspromotions.models.BulletinSubscription.set_member_subscribed(member, True if request.POST['bulletin_subscribe'] == '1' else False)
-		for group in sspromotions.models.Group.objects.filter(subscribable=True).all():
-			if ('bulletin_group_' + str(group.id)) in request.POST and request.POST['bulletin_group_' + str(group.id)]:
-				group.subscribe_member(member, True)
-			else:
-				group.subscribe_member(member, False)
+		if 'sspromotions' in settings.INSTALLED_APPS:
+			import sspromotions.models
+			sspromotions.models.BulletinSubscription.set_member_subscribed(member, True if request.POST['bulletin_subscribe'] == '1' else False)
+			for group in sspromotions.models.Group.objects.filter(subscribable=True).all():
+				if ('bulletin_group_' + str(group.id)) in request.POST and request.POST['bulletin_group_' + str(group.id)]:
+					group.subscribe_member(member, True)
+				else:
+					group.subscribe_member(member, False)
 		
 		return render(request, 'ssmembership/renew/complete.html')
 
@@ -209,12 +210,13 @@ def signup_save(request):
 		member.save()
 		
 		# Update bulletin
-		import sspromotions.models
-		sspromotions.models.BulletinSubscription.set_member_subscribed(member, True if request.POST['bulletin_subscribe'] == '1' else False)
-		for group in sspromotions.models.Group.objects.filter(subscribable=True).all():
-			if ('bulletin_group_' + str(group.id)) in request.POST and request.POST['bulletin_group_' + str(group.id)]:
-				group.subscribe_member(member, True)
-			else:
-				group.subscribe_member(member, False)
+		if 'sspromotions' in settings.INSTALLED_APPS:
+			import sspromotions.models
+			sspromotions.models.BulletinSubscription.set_member_subscribed(member, True if request.POST['bulletin_subscribe'] == '1' else False)
+			for group in sspromotions.models.Group.objects.filter(subscribable=True).all():
+				if ('bulletin_group_' + str(group.id)) in request.POST and request.POST['bulletin_group_' + str(group.id)]:
+					group.subscribe_member(member, True)
+				else:
+					group.subscribe_member(member, False)
 		
 		return render(request, 'ssmembership/signup/complete.html')