diff --git a/.rubocop.yml b/.rubocop.yml
index 0f92631ba..483b38bbe 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -8,6 +8,7 @@ AllCops:
   DisplayStyleGuide: true
   Exclude:
     - "db/schema.rb"
+    - "lib/ckeditor/backend/active_storage.rb"
   DisabledByDefault: true
 
 Bundler/DuplicatedGem:
diff --git a/lib/ckeditor/backend/active_storage.rb b/lib/ckeditor/backend/active_storage.rb
new file mode 100644
index 000000000..710db0aed
--- /dev/null
+++ b/lib/ckeditor/backend/active_storage.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+# Code copied from the ckeditor gem:
+# https://github.com/galetahub/ckeditor/pull/853
+module Ckeditor
+  module Backend
+    module ActiveStorage
+      def self.included(base)
+        base.send(:include, Rails.application.routes.url_helpers)
+        base.send(:include, InstanceMethods)
+        base.send(:extend, ClassMethods)
+      end
+
+      module ClassMethods
+        def self.extended(base)
+          base.class_eval do
+            before_save :apply_data
+            validate do
+              if data.nil? || file.nil?
+                errors.add(:data, :not_data_present, message: "data must be present")
+              end
+            end
+          end
+        end
+      end
+
+      module InstanceMethods
+        def url
+          rails_blob_path(self.storage_data, only_path: true)
+        end
+
+        def path
+          rails_blob_path(self.storage_data, only_path: true)
+        end
+
+        def styles
+        end
+
+        def content_type
+          self.storage_data.content_type
+        end
+
+        def content_type=(_content_type)
+          self.storage_data.content_type = _content_type
+        end
+
+        protected
+
+          def file
+            @file ||= storage_data
+          end
+
+          def blob
+            @blob ||= ::ActiveStorage::Blob.find(file.attachment.blob_id)
+          end
+
+          def apply_data
+            if data.is_a?(Ckeditor::Http::QqFile)
+              storage_data.attach(io: data, filename: data.original_filename)
+            else
+              storage_data.attach(data)
+            end
+
+            self.data_file_name = storage_data.blob.filename
+            self.data_content_type = storage_data.blob.content_type
+            self.data_file_size = storage_data.blob.byte_size
+          end
+      end
+    end
+
+    autoload :ActiveStorage, "ckeditor/backend/active_storage"
+  end
+end