diff --git a/app/models/preview_card.rb b/app/models/preview_card.rb
index b7efac354a64fd26f4fae9cc8637bb2c50f7c5ca..e2bf65d94776659e5af4c81c03ef4befe26ab45a 100644
--- a/app/models/preview_card.rb
+++ b/app/models/preview_card.rb
@@ -32,7 +32,7 @@ class PreviewCard < ApplicationRecord
 
   has_and_belongs_to_many :statuses
 
-  has_attached_file :image, styles: { original: '280x120>' }, convert_options: { all: '-quality 80 -strip' }
+  has_attached_file :image, styles: { original: '280x280>' }, convert_options: { all: '-quality 80 -strip' }
 
   include Attachmentable
   include Remotable