diff --git a/app/lib/activitypub/tag_manager.rb b/app/lib/activitypub/tag_manager.rb
index 23b44be372..f7f2d18618 100644
--- a/app/lib/activitypub/tag_manager.rb
+++ b/app/lib/activitypub/tag_manager.rb
@@ -99,7 +99,7 @@ class ActivityPub::TagManager
     when 'public'
       [COLLECTIONS[:public]]
     when 'unlisted', 'private'
-      [account_followers_url(status.account)]
+      [followers_uri_for(status.account)]
     when 'direct', 'limited'
       if status.account.silenced?
         # Only notify followers if the account is locally silenced
@@ -133,7 +133,7 @@ class ActivityPub::TagManager
 
     case status.visibility
     when 'public'
-      cc << account_followers_url(status.account)
+      cc << followers_uri_for(status.account)
     when 'unlisted'
       cc << COLLECTIONS[:public]
     end
diff --git a/app/serializers/activitypub/actor_serializer.rb b/app/serializers/activitypub/actor_serializer.rb
index f698e758e8..02d54ca9f3 100644
--- a/app/serializers/activitypub/actor_serializer.rb
+++ b/app/serializers/activitypub/actor_serializer.rb
@@ -44,7 +44,7 @@ class ActivityPub::ActorSerializer < ActivityPub::Serializer
   delegate :suspended?, :instance_actor?, to: :object
 
   def id
-    object.instance_actor? ? instance_actor_url : account_url(object)
+    ActivityPub::TagManager.instance.uri_for(object)
   end
 
   def type
diff --git a/app/serializers/webfinger_serializer.rb b/app/serializers/webfinger_serializer.rb
index b67cd2771a..1cb3175c07 100644
--- a/app/serializers/webfinger_serializer.rb
+++ b/app/serializers/webfinger_serializer.rb
@@ -13,7 +13,7 @@ class WebfingerSerializer < ActiveModel::Serializer
     if object.instance_actor?
       [instance_actor_url]
     else
-      [short_account_url(object), account_url(object)]
+      [short_account_url(object), ActivityPub::TagManager.instance.uri_for(object)]
     end
   end
 
@@ -43,6 +43,6 @@ class WebfingerSerializer < ActiveModel::Serializer
   end
 
   def self_href
-    object.instance_actor? ? instance_actor_url : account_url(object)
+    ActivityPub::TagManager.instance.uri_for(object)
   end
 end