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-rw-r--r--app/models/custom_emoji.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/app/models/custom_emoji.rb b/app/models/custom_emoji.rb
index e80c58155..9e9be5e12 100644
--- a/app/models/custom_emoji.rb
+++ b/app/models/custom_emoji.rb
@@ -21,7 +21,7 @@ class CustomEmoji < ApplicationRecord
     :(#{SHORTCODE_RE_FRAGMENT}):
     (?=[^[:alnum:]:]|$)/x
 
-  has_attached_file :image
+  has_attached_file :image, styles: { static: { format: 'png', convert_options: '-coalesce -strip' } }
 
   validates_attachment :image, content_type: { content_type: 'image/png' }, presence: true, size: { in: 0..50.kilobytes }
   validates :shortcode, uniqueness: { scope: :domain }, format: { with: /\A#{SHORTCODE_RE_FRAGMENT}\z/ }, length: { minimum: 2 }