diff --git a/app/models/cancer_predict_mapping_file.rb b/app/models/cancer_predict_mapping_file.rb
index 563870c..8cdaa27 100644
--- a/app/models/cancer_predict_mapping_file.rb
+++ b/app/models/cancer_predict_mapping_file.rb
@@ -1,9 +1,7 @@
 # encoding: utf-8
 class CancerPredictMappingFile
-  require 'carrierwave/processing/mime_types'
   include Mongoid::Document
   include Mongoid::Timestamps
-  include CarrierWave::MimeTypes
   mount_uploader :temp_file, HeadImagesUploader
   
   def file_identifier
diff --git a/app/models/head_images_uploader.rb b/app/models/head_images_uploader.rb
index c79e018..cc57d71 100644
--- a/app/models/head_images_uploader.rb
+++ b/app/models/head_images_uploader.rb
@@ -1,12 +1,7 @@
 # encoding: utf-8
-require 'carrierwave/processing/mime_types'
 
 class HeadImagesUploader < CarrierWave::Uploader::Base
 
-  include CarrierWave::MimeTypes
-    
-  process :set_content_type
-
   # Include RMagick or ImageScience support:
   # include CarrierWave::RMagick
   # include CarrierWave::ImageScience