diff --git a/pytrustnfe/nfe/__init__.py b/pytrustnfe/nfe/__init__.py
index 6a3d1d5..6b3feb5 100644
--- a/pytrustnfe/nfe/__init__.py
+++ b/pytrustnfe/nfe/__init__.py
@@ -134,6 +134,11 @@ def _send(certificado, method, **kwargs):
 
     port = next(iter(client.wsdl.port_types))
     first_operation = next(iter(client.wsdl.port_types[port].operations))
+    
+    namespaceNFe = xml.find(".//{http://www.portalfiscal.inf.br/nfe}NFe")
+    if namespaceNFe is not None:
+        namespaceNFe.set('xmlns', 'http://www.portalfiscal.inf.br/nfe')
+            
     with client.settings(raw_response=True):
         response = client.service[first_operation](xml)
         response, obj = sanitize_response(response.text)
diff --git a/setup.py b/setup.py
index 64b892a..5dd4489 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 # coding=utf-8
 from setuptools import setup, find_packages
 
-VERSION = "1.0.0"
+VERSION = "1.0.1"
 
 
 setup(