diff --git a/app/uploaders/processed_image.rb b/app/uploaders/processed_image.rb
index d76b443b3..88e889a0a 100644
--- a/app/uploaders/processed_image.rb
+++ b/app/uploaders/processed_image.rb
@@ -10,7 +10,7 @@ class ProcessedImage < CarrierWave::Uploader::Base
   end
 
   def extension_white_list
-    %w(jpg jpeg png gif)
+    %w(jpg jpeg png gif tiff)
   end
 
   def filename