diff --git a/config/environment.rb b/config/environment.rb
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -59,4 +59,4 @@
 
 # Include your application configuration below
 
-UPLOADED_INPUT_FILE_DIR = '/home/jittat/web_grader/upload/'
+UPLOADED_INPUT_FILE_DIR = RAILS_ROOT + '/upload'