diff --git a/pynfe/utils/__init__.py b/pynfe/utils/__init__.py
index fd7dea7..9646891 100644
--- a/pynfe/utils/__init__.py
+++ b/pynfe/utils/__init__.py
@@ -10,7 +10,10 @@ try:
 except ImportError:
     raise Exception('Falhou ao importar lxml/ElementTree')
 
-from io import StringIO
+try:
+    from StringIO import StringIO
+except ImportError:
+    from io import StringIO
 
 try:
     from . import flags