diff --git a/app/javascript/mastodon/utils/resize_image.js b/app/javascript/mastodon/utils/resize_image.js
index 1628d7bff..37cd4c977 100644
--- a/app/javascript/mastodon/utils/resize_image.js
+++ b/app/javascript/mastodon/utils/resize_image.js
@@ -1,6 +1,6 @@
 import EXIF from 'exif-js';
 
-const MAX_IMAGE_PIXELS = 3686400; //1920x1920px
+const MAX_IMAGE_PIXELS = 8847360; //4096x2160px
 
 const getImageUrl = inputFile => new Promise((resolve, reject) => {
   if (window.URL && URL.createObjectURL) {
diff --git a/app/models/media_attachment.rb b/app/models/media_attachment.rb
index c3ec65683..a74edc327 100644
--- a/app/models/media_attachment.rb
+++ b/app/models/media_attachment.rb
@@ -40,7 +40,7 @@ class MediaAttachment < ApplicationRecord
 
   IMAGE_STYLES = {
     original: {
-      pixels: 3_686_400, #1920x1920px
+      pixels: 8_847_360, #4096x2160px
       file_geometry_parser: FastGeometryParser,
     },