diff --git a/client-py3/full/src/UDSClient.py b/client-py3/full/src/UDSClient.py
index f77fafb8..043ff3cb 100755
--- a/client-py3/full/src/UDSClient.py
+++ b/client-py3/full/src/UDSClient.py
@@ -30,9 +30,6 @@
 '''
 @author: Adolfo Gómez, dkmaster at dkmon dot com
 '''
-# pylint: disable=c-extension-no-member
-from __future__ import unicode_literals
-
 import sys
 import webbrowser
 import json
@@ -118,7 +115,6 @@ class UDSClient(QtWidgets.QMainWindow):
     def cancelPushed(self):
         self.close()
 
-    @QtCore.pyqtSlot()
     def updateAnim(self):
         self.anim += 2
         if self.anim > 99:
@@ -139,12 +135,10 @@ class UDSClient(QtWidgets.QMainWindow):
         self.ui.progressBar.invertedAppearance = False
         self.animTimer.stop()
 
-    @QtCore.pyqtSlot()
     def getVersion(self):
         self.req = RestRequest('', self, self.version)
         self.req.get()
 
-    @QtCore.pyqtSlot(dict)
     def version(self, data):
         try:
             self.processError(data)
@@ -160,14 +154,12 @@ class UDSClient(QtWidgets.QMainWindow):
             self.getTransportData()
 
         except RetryException as e:
-            self.ui.info.setText(six.text_type(e))
+            self.ui.info.setText(str(e))
             QtCore.QTimer.singleShot(1000, self.getVersion)
 
         except Exception as e:
             self.showError(e)
 
-
-    @QtCore.pyqtSlot()
     def getTransportData(self):
         try:
             self.req = RestRequest('/{}/{}'.format(self.ticket, self.scrambler), self, self.transportDataReceived, params={'hostname': tools.getHostName(), 'version': VERSION})
@@ -176,8 +168,6 @@ class UDSClient(QtWidgets.QMainWindow):
             logger.exception('Got exception on getTransportData')
             raise e
 
-
-    @QtCore.pyqtSlot(dict)
     def transportDataReceived(self, data):
         logger.debug('Transport data received')
         try:
@@ -274,6 +264,7 @@ def approveHost(hostName, parentWindow=None):
 
 if __name__ == "__main__":
     logger.debug('Initializing connector')
+    
     # Initialize app
     app = QtWidgets.QApplication(sys.argv)
 
diff --git a/client-py3/full/src/uds/rest.py b/client-py3/full/src/uds/rest.py
index 48a0ea51..5857a427 100644
--- a/client-py3/full/src/uds/rest.py
+++ b/client-py3/full/src/uds/rest.py
@@ -31,13 +31,10 @@
 @author: Adolfo Gómez, dkmaster at dkmon dot com
 '''
 # pylint: disable=c-extension-no-member,no-name-in-module
-from __future__ import unicode_literals
 
 import json
 import urllib
 
-import six
-
 from PyQt5.QtCore import pyqtSignal, pyqtSlot
 from PyQt5.QtCore import QObject, QUrl, QSettings
 from PyQt5.QtCore import Qt
@@ -60,8 +57,16 @@ class RestRequest(QObject):
         super(RestRequest, self).__init__()
         # private
         self._manager = QNetworkAccessManager()
+        try:
+            if os.path.exists('/etc/ssl/certs/ca-certificates.crt'):
+                pass
+                # os.environ['REQUESTS_CA_BUNDLE'] = '/etc/ssl/certs/ca-certificates.crt'
+        except Exception:
+            pass
+
+
         if params is not None:
-            url += '?' + '&'.join('{}={}'.format(k, urllib.parse.quote(six.text_type(v).encode('utf8'))) for k, v in params.items())
+            url += '?' + '&'.join('{}={}'.format(k, urllib.parse.quote(str(v).encode('utf8'))) for k, v in params.items())
 
         self.url = QUrl(RestRequest.restApiUrl + url)
 
@@ -79,14 +84,12 @@ class RestRequest(QObject):
         try:
             if reply.error() != QNetworkReply.NoError:
                 raise Exception(reply.errorString())
-            #data = six.text_type(reply.readAll())
             data = bytes(reply.readAll())
-            #data = data.encode("utf-8")
             data = json.loads(data)
         except Exception as e:
             data = {
                 'result': None,
-                'error': six.text_type(e)
+                'error': str(e)
             }
 
         self.done.emit(data)
@@ -97,7 +100,7 @@ class RestRequest(QObject):
         settings = QSettings()
         settings.beginGroup('ssl')
         cert = errors[0].certificate()
-        digest = six.text_type(cert.digest().toHex())
+        digest = str(cert.digest().toHex())
 
         approved = settings.value(digest, False)