diff --git a/pybossa/cloud_store_api/s3.py b/pybossa/cloud_store_api/s3.py
index bfd044e727..9304580d16 100644
--- a/pybossa/cloud_store_api/s3.py
+++ b/pybossa/cloud_store_api/s3.py
@@ -31,7 +31,8 @@
                       'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
                       'audio/mpeg',
                       'audio/wav',
-                      'application/json']
+                      'application/json',
+                      'application/csv']
 
 
 DEFAULT_CONN = 'S3_DEFAULT'