diff --git a/app/models/custom_emoji.rb b/app/models/custom_emoji.rb
index 3bd8c0b895..0ebb28dc23 100644
--- a/app/models/custom_emoji.rb
+++ b/app/models/custom_emoji.rb
@@ -24,7 +24,7 @@
 class CustomEmoji < ApplicationRecord
   include Attachmentable
 
-  LIMIT = 256.kilobytes
+  LIMIT = 512.kilobytes
 
   SHORTCODE_RE_FRAGMENT = '[a-zA-Z0-9_]{2,}'