diff --git a/pytrustnfe/certificado.py b/pytrustnfe/certificado.py
index b96df91..d24732c 100644
--- a/pytrustnfe/certificado.py
+++ b/pytrustnfe/certificado.py
@@ -2,8 +2,7 @@
 # © 2016 Danimar Ribeiro, Trustcode
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
-
-from uuid import uuid4
+import tempfile
 from OpenSSL import crypto
 
 
@@ -13,7 +12,7 @@ class Certificado(object):
         self.password = password
 
     def save_pfx(self):
-        pfx_temp = '/tmp/' + uuid4().hex
+        pfx_temp = tempfile.mkstemp()[1]
         arq_temp = open(pfx_temp, 'wb')
         arq_temp.write(self.pfx)
         arq_temp.close()
@@ -32,8 +31,8 @@ def extract_cert_and_key_from_pfx(pfx, password):
 
 
 def save_cert_key(cert, key):
-    cert_temp = '/tmp/' + uuid4().hex
-    key_temp = '/tmp/' + uuid4().hex
+    cert_temp = tempfile.mkstemp()[1]
+    key_temp = tempfile.mkstemp()[1]
 
     arq_temp = open(cert_temp, 'w')
     arq_temp.write(cert)
diff --git a/requirements.txt b/requirements.txt
index 886103b..c42cf9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ Jinja2
 signxml
 urllib3 >= 1.22
 suds-jurko >= 0.6
-suds-jurko-requests >= 1.0
+suds-jurko-requests >= 1.1
 defusedxml >= 0.4.1, < 0.6
 eight >= 0.3.0, < 0.5
 cryptography >= 1.8, < 1.10
diff --git a/setup.py b/setup.py
index e5a3b5d..84740cf 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 # coding=utf-8
 from setuptools import setup, find_packages
 
-VERSION = "0.1.0"
+VERSION = "0.1.1"
 
 setup(
     name="PyTrustNFe3",
@@ -41,7 +41,7 @@ later (LGPLv2+)',
         'signxml >= 2.4.0',
         'lxml >= 3.5.0, < 4',
         'suds-jurko >= 0.6',
-        'suds-jurko-requests >= 0.3',
+        'suds-jurko-requests >= 1.1',
         'reportlab'
     ],
     tests_require=[