diff --git a/app/models/asset.rb b/app/models/asset.rb
index eaeedc0df..316e0b978 100644
--- a/app/models/asset.rb
+++ b/app/models/asset.rb
@@ -451,7 +451,7 @@ class Asset < ApplicationRecord
   def generate_temp_file
     tempfile = Tempfile.new
     tempfile.binmode
-    tempfile << file.download
+    file.blob.download { |chunk| tempfile.write(chunk) }
     tempfile.rewind
     tempfile
   end
diff --git a/app/models/tiny_mce_asset.rb b/app/models/tiny_mce_asset.rb
index 70f0dda5b..5bdd455b1 100644
--- a/app/models/tiny_mce_asset.rb
+++ b/app/models/tiny_mce_asset.rb
@@ -194,7 +194,7 @@ class TinyMceAsset < ApplicationRecord
   def generate_temp_file
     tempfile = Tempfile.new
     tempfile.binmode
-    tempfile << image.download
+    image.blob.download { |chunk| tempfile.write(chunk) }
     tempfile.rewind
     tempfile
   end