diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index 6c9edaa09..2ee4a4ccc 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -413,7 +413,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   def text_from_content
     return Formatter.instance.linkify([[text_from_name, text_from_summary.presence].compact.join("\n\n"), object_url || object_uri].join(' ')) if converted_object_type?
 
-    if @object['quoteUrl'].blank? && @object['_misskey_quote'].present?
+    if @object['quoteUri'].blank? && @object['_misskey_quote'].present?
       Formatter.instance.linkify(@object['_misskey_content'])
     elsif @object['content'].present?
       @object['content']
@@ -554,7 +554,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   end
 
   def quote
-    @quote ||= quote_from_url(@object['quoteUrl'] || @object['_misskey_quote'])
+    @quote ||= quote_from_url(@object['quoteUri'] || @object['_misskey_quote'])
   end
 
   def process_quote
diff --git a/app/lib/activitypub/adapter.rb b/app/lib/activitypub/adapter.rb
index 7e391f1c1..c6e177eae 100644
--- a/app/lib/activitypub/adapter.rb
+++ b/app/lib/activitypub/adapter.rb
@@ -24,8 +24,8 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base
     voters_count: { 'toot' => 'http://joinmastodon.org/ns#', 'votersCount' => 'toot:votersCount' },
     olm: { 'toot' => 'http://joinmastodon.org/ns#', 'Device' => 'toot:Device', 'Ed25519Signature' => 'toot:Ed25519Signature', 'Ed25519Key' => 'toot:Ed25519Key', 'Curve25519Key' => 'toot:Curve25519Key', 'EncryptedMessage' => 'toot:EncryptedMessage', 'publicKeyBase64' => 'toot:publicKeyBase64', 'deviceId' => 'toot:deviceId', 'claim' => { '@type' => '@id', '@id' => 'toot:claim' }, 'fingerprintKey' => { '@type' => '@id', '@id' => 'toot:fingerprintKey' }, 'identityKey' => { '@type' => '@id', '@id' => 'toot:identityKey' }, 'devices' => { '@type' => '@id', '@id' => 'toot:devices' }, 'messageFranking' => 'toot:messageFranking', 'messageType' => 'toot:messageType', 'cipherText' => 'toot:cipherText' },
     suspended: { 'toot' => 'http://joinmastodon.org/ns#', 'suspended' => 'toot:suspended' },
-    quoteUrl: { 'quoteUrl' => 'as:quoteUrl' },
-    expiry: { 'toot' => 'http://joinmastodon.org/ns#', 'expiry' => 'toot:expiry' },
+    quote_uri: { 'fedibird' => 'http://fedibird.com/ns#', 'quoteUri' => 'fedibird:quoteUri' },
+    expiry: { 'fedibird' => 'http://fedibird.com/ns#', 'expiry' => 'fedibird:expiry' },
   }.freeze
 
   def self.default_key_transform
diff --git a/app/serializers/activitypub/note_serializer.rb b/app/serializers/activitypub/note_serializer.rb
index 0f771dfd5..40230e7af 100644
--- a/app/serializers/activitypub/note_serializer.rb
+++ b/app/serializers/activitypub/note_serializer.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class ActivityPub::NoteSerializer < ActivityPub::Serializer
-  context_extensions :atom_uri, :conversation, :sensitive, :voters_count, :expiry
+  context_extensions :atom_uri, :conversation, :sensitive, :voters_count, :quote_uri, :expiry
 
   attributes :id, :type, :summary,
              :in_reply_to, :published, :url,
@@ -9,7 +9,7 @@ class ActivityPub::NoteSerializer < ActivityPub::Serializer
              :atom_uri, :in_reply_to_atom_uri,
              :conversation, :context
 
-  attribute :quote_url, if: -> { object.quote? }
+  attribute :quote_uri, if: -> { object.quote? }
   attribute :misskey_quote, key: :_misskey_quote, if: -> { object.quote? }
   attribute :misskey_content, key: :_misskey_content, if: -> { object.quote? }
   attribute :content
@@ -138,11 +138,11 @@ class ActivityPub::NoteSerializer < ActivityPub::Serializer
     end
   end
 
-  def quote_url
+  def quote_uri
     ActivityPub::TagManager.instance.uri_for(object.quote) if object.quote?
   end
 
-  alias misskey_quote quote_url
+  alias misskey_quote quote_uri
 
   def misskey_content
     object.text if object.quote?