diff --git a/src/erpbrasil/edoc/pdf/__init__.py b/src/erpbrasil/edoc/pdf/__init__.py
index c89fe99..ec81f51 100644
--- a/src/erpbrasil/edoc/pdf/__init__.py
+++ b/src/erpbrasil/edoc/pdf/__init__.py
@@ -6,3 +6,6 @@
     objectify.ObjectifyElementClassLookup())
 parser = etree.XMLParser()
 parser.set_element_class_lookup(lookup)
+
+from erpbrasil.edoc.pdf import nfe
+from erpbrasil.edoc.pdf.base import ImprimirXml
diff --git a/src/erpbrasil/edoc/pdf/nfe.py b/src/erpbrasil/edoc/pdf/nfe.py
index 8bd3ecd..6a6f723 100644
--- a/src/erpbrasil/edoc/pdf/nfe.py
+++ b/src/erpbrasil/edoc/pdf/nfe.py
@@ -1,8 +1,10 @@
+import re
+from lxml import objectify, etree
+
 from erpbrasil.edoc.pdf.base import VoidElement
 from erpbrasil.edoc.pdf import lookup
-from lxml import objectify, etree
+
 from erpbrasil.edoc.pdf import danfe_formata
-import re
 
 nfe_namespace = lookup.get_namespace('http://www.portalfiscal.inf.br/nfe')