diff --git a/activestorage/lib/active_storage/service/s3_service.rb b/activestorage/lib/active_storage/service/s3_service.rb
index 5e489f4be173b950d0b8570d458dea6a3d4096e8..0286e7ff21b22bf4699e79006620ada4cce34c64 100644
--- a/activestorage/lib/active_storage/service/s3_service.rb
+++ b/activestorage/lib/active_storage/service/s3_service.rb
@@ -33,7 +33,7 @@ def download(key, &block)
         end
       else
         instrument :download, key: key do
-          object_for(key).get.body.read.force_encoding(Encoding::BINARY)
+          object_for(key).get.body.string.force_encoding(Encoding::BINARY)
         end
       end
     end