diff --git a/app/serializers/initial_state_serializer.rb b/app/serializers/initial_state_serializer.rb
index fb53ea3145e8449e64d0992f5c35818db2ef330a..e74f0b74068ea210d8f46650b57ce9273730cf4f 100644
--- a/app/serializers/initial_state_serializer.rb
+++ b/app/serializers/initial_state_serializer.rb
@@ -2,10 +2,14 @@
 
 class InitialStateSerializer < ActiveModel::Serializer
   attributes :meta, :compose, :accounts,
-             :media_attachments, :settings
+             :media_attachments, :settings, :max_toot_chars
 
   has_one :push_subscription, serializer: REST::WebPushSubscriptionSerializer
 
+  def max_toot_chars
+    StatusLengthValidator::MAX_CHARS
+  end
+
   def meta
     store = {
       streaming_api_base_url: Rails.configuration.x.streaming_api_base_url,
diff --git a/app/serializers/rest/instance_serializer.rb b/app/serializers/rest/instance_serializer.rb
index 1bd71683ce83b0bba180166fd7d2d2d6b77e1313..e2a65c17890b221572e33b3c023702ad8dc51a1f 100644
--- a/app/serializers/rest/instance_serializer.rb
+++ b/app/serializers/rest/instance_serializer.rb
@@ -5,12 +5,16 @@ class REST::InstanceSerializer < ActiveModel::Serializer
 
   attributes :uri, :title, :short_description, :description, :email,
              :version, :urls, :stats, :thumbnail,
-             :languages, :registrations, :approval_required
+             :languages, :registrations, :approval_required, :max_toot_chars
 
   has_one :contact_account, serializer: REST::AccountSerializer
 
   delegate :contact_account, to: :instance_presenter
 
+  def max_toot_chars
+    StatusLengthValidator::MAX_CHARS
+  end
+
   def uri
     Rails.configuration.x.local_domain
   end