diff --git a/tablib/formats/_csv.py b/tablib/formats/_csv.py
index 572d196..3a4c374 100644
--- a/tablib/formats/_csv.py
+++ b/tablib/formats/_csv.py
@@ -10,7 +10,7 @@ title = 'csv'
 extentions = ('csv',)
 
 
-DEFAULT_ENCODING = 'utf-8-sig'
+DEFAULT_ENCODING = 'utf-8'
 
 
 
diff --git a/tablib/formats/_tsv.py b/tablib/formats/_tsv.py
index 855dff4..f581f81 100644
--- a/tablib/formats/_tsv.py
+++ b/tablib/formats/_tsv.py
@@ -10,7 +10,7 @@ from tablib.compat import is_py3, csv, StringIO
 title = 'tsv'
 extentions = ('tsv',)
 
-DEFAULT_ENCODING = 'utf-8-sig'
+DEFAULT_ENCODING = 'utf-8'
 
 def export_set(dataset):
     """Returns a TSV representation of Dataset."""