diff --git a/setup.py b/setup.py
index 969ac7b..02c85b2 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,5 @@
+# -*- coding: utf-8 -*-
+
 from setuptools import setup, find_packages
 from setuptools.command.test import test as test_command
 from sped import __version__
diff --git a/sped/arquivos.py b/sped/arquivos.py
index 5242969..abe4982 100644
--- a/sped/arquivos.py
+++ b/sped/arquivos.py
@@ -41,17 +41,17 @@ def read_registro(self, line):
             bloco.add(registro)
 
     def write_to(self, buffer):
-        buffer.write(self._registro_abertura.as_line() + '\r\n')
+        buffer.write(self._registro_abertura.as_line() + u'\r\n')
         reg_count = 2
         for key in self._blocos.keys():
             bloco = self._blocos[key]
             reg_count += len(bloco.registros)
             for r in bloco.registros:
-                buffer.write(r.as_line() + '\r\n')
+                buffer.write(r.as_line() + u'\r\n')
 
         self._registro_fechamento[2] = reg_count
 
-        buffer.write(self._registro_fechamento.as_line() + '\r\n')
+        buffer.write(self._registro_fechamento.as_line() + u'\r\n')
 
     def getstring(self):
         buffer = StringIO()
diff --git a/sped/campos.py b/sped/campos.py
index dbb3aeb..fdebc83 100644
--- a/sped/campos.py
+++ b/sped/campos.py
@@ -83,7 +83,7 @@ class CampoFixo(Campo):
     '0000'
     """
     def __init__(self, indice, nome, valor):
-        super().__init__(indice, nome, True)
+        super(CampoFixo, self).__init__(indice, nome, True)
         self._valor = valor
 
     @property
@@ -99,7 +99,7 @@ def set(self, registro, valor):
 
 class CampoAlfanumerico(Campo):
     def __init__(self, indice, nome, obrigatorio=False, tamanho=255):
-        super().__init__(indice, nome, obrigatorio)
+        super(CampoAlfanumerico, self).__init__(indice, nome, obrigatorio)
         self._tamanho = tamanho
 
     @property
@@ -109,12 +109,12 @@ def tamanho(self):
     def set(self, registro, valor):
         valor = valor or ''
         valor = valor[:self._tamanho]
-        super().set(registro, valor)
+        super(CampoAlfanumerico, self).set(registro, valor)
 
 
 class CampoNumerico(Campo):
     def __init__(self, indice, nome, obrigatorio=False, precisao=0, minimo=0, maximo=1000):
-        super().__init__(indice, nome, obrigatorio)
+        super(CampoNumerico, self).__init__(indice, nome, obrigatorio)
         self._precisao = precisao
         self._minimo = minimo
         self._maximo = maximo
@@ -132,49 +132,49 @@ def maximo(self):
         return self._maximo
 
     def get(self, registro):
-        valor = super().get(registro)
+        valor = super(CampoNumerico, self).get(registro)
         if not valor:
             return None
         return Decimal(valor.replace(',', '.'))
 
     def set(self, registro, valor):
         if isinstance(valor, Decimal) or isinstance(valor, float):
-            super().set(registro, (('%.' + str(self._precisao) + 'f') % valor).replace('.', ','))
+            super(CampoNumerico, self).set(registro, (('%.' + str(self._precisao) + 'f') % valor).replace('.', ','))
         elif isinstance(valor, int):
-            super().set(registro, str(valor))
+            super(CampoNumerico, self).set(registro, str(valor))
         elif not valor:
-            super().set(registro, '0')
+            super(CampoNumerico, self).set(registro, '0')
         else:
             raise FormatoInvalidoError(registro, self.nome)
 
 
 class CampoData(Campo):
     def __init__(self, indice, nome, obrigatorio=False):
-        super().__init__(indice, nome, obrigatorio)
+        super(CampoData, self).__init__(indice, nome, obrigatorio)
 
     def get(self, registro):
-        valor = super().get(registro)
+        valor = super(CampoData, self).get(registro)
         if not valor:
             return None
         return datetime.strptime(valor, '%d%m%Y').date()
 
     def set(self, registro, valor):
         if isinstance(valor, date):
-            super().set(registro, valor.strftime('%d%m%Y'))
+            super(CampoData, self).set(registro, valor.strftime('%d%m%Y'))
         elif not valor:
-            super().set(registro, None)
+            super(CampoData, self).set(registro, None)
         else:
             raise FormatoInvalidoError(registro, self.nome)
 
 
 class CampoRegex(Campo):
     def __init__(self, indice, nome, obrigatorio=False, regex=None):
-        super().__init__(indice, nome, obrigatorio)
+        super(CampoRegex, self).__init__(indice, nome, obrigatorio)
         self._regex = re.compile('^' + regex + '$')
 
     def set(self, registro, valor):
         if not valor or self._regex.match(valor):
-            super().set(registro, valor)
+            super(CampoRegex, self).set(registro, valor)
         else:
             raise FormatoInvalidoError(registro, self.nome)
 
diff --git a/sped/ecd/arquivos.py b/sped/ecd/arquivos.py
index f88e7b3..05cd0aa 100644
--- a/sped/ecd/arquivos.py
+++ b/sped/ecd/arquivos.py
@@ -19,7 +19,7 @@ class ArquivoDigital(ArquivoDigital):
     blocos = blocos
 
     def __init__(self):
-        super().__init__()
+        super(ArquivoDigital, self).__init__()
         self._blocos['0'] = Bloco0()
         self._blocos['I'] = BlocoI()
         self._blocos['J'] = BlocoJ()
diff --git a/sped/ecd/blocos.py b/sped/ecd/blocos.py
index 8d67085..9f150fc 100644
--- a/sped/ecd/blocos.py
+++ b/sped/ecd/blocos.py
@@ -20,7 +20,7 @@ class Bloco0(Bloco):
 
     @property
     def fechamento(self):
-        registro = super().fechamento
+        registro = Bloco.fechamento.fget(self)
         registro[2] += 1
         return registro
 
@@ -50,6 +50,6 @@ class Bloco9(Bloco):
 
     @property
     def fechamento(self):
-        registro = super().fechamento
+        registro = super(Bloco9, self).fechamento
         registro[2] += 1
         return registro
diff --git a/sped/ecf/arquivos.py b/sped/ecf/arquivos.py
index 492478b..a118a05 100644
--- a/sped/ecf/arquivos.py
+++ b/sped/ecf/arquivos.py
@@ -28,7 +28,7 @@ class ArquivoDigital(ArquivoDigital):
     blocos = blocos
 
     def __init__(self):
-        super().__init__()
+        super(ArquivoDigital, self).__init__()
         self._blocos['0'] = Bloco0()
         self._blocos['C'] = BlocoC()
         self._blocos['E'] = BlocoE()
diff --git a/sped/efd/icms_ipi/arquivos.py b/sped/efd/icms_ipi/arquivos.py
index fef9094..e9aba78 100644
--- a/sped/efd/icms_ipi/arquivos.py
+++ b/sped/efd/icms_ipi/arquivos.py
@@ -23,7 +23,7 @@ class ArquivoDigital(ArquivoDigital):
     blocos = blocos
 
     def __init__(self):
-        super().__init__()
+        super(ArquivoDigital, self).__init__()
         self._blocos['0'] = Bloco0()
         self._blocos['C'] = BlocoC()
         self._blocos['D'] = BlocoD()
diff --git a/sped/efd/pis_cofins/arquivos.py b/sped/efd/pis_cofins/arquivos.py
index aff5fc1..f68b064 100644
--- a/sped/efd/pis_cofins/arquivos.py
+++ b/sped/efd/pis_cofins/arquivos.py
@@ -24,7 +24,7 @@ class ArquivoDigital(ArquivoDigital):
     blocos = blocos
 
     def __init__(self):
-        super().__init__()
+        super(ArquivoDigital, self).__init__()
         self._blocos['0'] = Bloco0()
         self._blocos['A'] = BlocoA()
         self._blocos['C'] = BlocoC()
diff --git a/sped/erros.py b/sped/erros.py
index 9803026..1e3b3d0 100644
--- a/sped/erros.py
+++ b/sped/erros.py
@@ -6,16 +6,16 @@ def __init__(self, registro):
         self._registro = registro
 
     def __str__(self):
-        return '{0}'.format(self._registro)
+        return u'{0}'.format(self._registro)
 
 
 class CampoError(RegistroError):
     def __init__(self, registro, campo):
-        super().__init__(registro)
+        super(CampoError, self).__init__(registro)
         self._campo = campo
 
     def __str__(self):
-        return '{0} -> {1}'.format(self._registro.__class__.__name__, self._campo)
+        return u'{0} -> {1}'.format(self._registro.__class__.__name__, self._campo)
 
 
 class CampoFixoError(CampoError):
diff --git a/sped/registros.py b/sped/registros.py
index e88fbd7..b8074e4 100644
--- a/sped/registros.py
+++ b/sped/registros.py
@@ -113,4 +113,4 @@ def __setattr__(self, name, value):
         campo.set(self, value)
 
     def as_line(self):
-        return '|'.join(self._valores)
+        return u'|'.join(self._valores)