diff --git a/apparatinterface.py b/apparatinterface.py
index de66f6e..bf5cc11 100644
--- a/apparatinterface.py
+++ b/apparatinterface.py
@@ -66,14 +66,14 @@ class FeApUserInterface(object):
                 cb(self.__nsi_cnt % 10)
 
     def __on_nsi_falling(self, pin):
-        #print 'nsi'
+        #print('nsi')
         self.__nsi_cnt += 1
 
     def __on_gabelschalter_change(self, pin):
         gbstate = gpio.input(self.__pinconfig.pin_gabelschalter)
         if self.__pinconfig.invert_gs:
             gbstate = 1 - gbstate
-        print 'gabelschalter:', gbstate
+        print('gabelschalter:', gbstate)
         for cb in self.__gabelschalter_callbacks:
             cb(gbstate)
 
@@ -89,10 +89,10 @@ class FeApUserInterface(object):
                 gpio.output(self.__pinconfig.pin_wecker_b, 1)
                 time.sleep(0.02)
                 c += 40
-                print 'ring'
+                print('ring')
             gpio.output(self.__pinconfig.pin_wecker_enable, 0)
 
-            print ''
+            print('')
             time.sleep(4)
 
 
@@ -123,7 +123,7 @@ if __name__ == '__main__':
     t = FeApUserInterface(pinconfig)
 
     def dailed(num):
-        print num
+        print(num)
 
     t.add_nummernschalter_callback(dailed)
 
diff --git a/configreader.py b/configreader.py
index 4ce26aa..69d6898 100644
--- a/configreader.py
+++ b/configreader.py
@@ -1,5 +1,5 @@
 import csv
-import ConfigParser
+import configparser
 import apparatinterface
 import phoneinterface
 import statemachine
@@ -20,7 +20,7 @@ class ConfigurationReader(object):
     }
 
     def __init__(self):
-        self.__cp = ConfigParser.ConfigParser(defaults=ConfigurationReader.DEFAULTS)
+        self.__cp = configparser.ConfigParser(defaults=ConfigurationReader.DEFAULTS)
         self.pinconfig = None
         self.dialconfig = None
         self.phoneconfig = None
@@ -45,9 +45,9 @@ class ConfigurationReader(object):
         shortcuts = {}
         with open(fname, 'r') as csvfile:
             for row in csv.DictReader(csvfile):
-                print 'row', row
+                print('row', row)
                 shortcuts[row['shortcut']] = row['number']
-        print 'shortcuts:', shortcuts
+        print('shortcuts:', shortcuts)
         return shortcuts
 
     def __read_blacklist(self):
@@ -61,7 +61,7 @@ class ConfigurationReader(object):
     def read(self, f):
         self.__cp.read(f)
 
-        print 'pin_nsa:', self.__get_global_val_int('pin_nsa'),
+        print('pin_nsa:', self.__get_global_val_int('pin_nsa'),)
         self.pinconfig = apparatinterface.FeApPinConfiguration(
             gpio_numbering = self.__get_global_val('gpio_numbering'),
             pin_nsa = self.__get_global_val_int('pin_nsa'),
diff --git a/fetapd.py b/fetapd.py
index 971feaf..48e9929 100644
--- a/fetapd.py
+++ b/fetapd.py
@@ -65,7 +65,7 @@ def phone_cb(event):
         controller.queue_event('invalid_number')
 
 if __name__ == '__main__':
-    print FeTAp
+    print(FeTAp)
 
     cfg = configreader.ConfigurationReader()
     cfg.read('fetap.ini')
diff --git a/phoneinterface.py b/phoneinterface.py
index 74d2122..484ea30 100644
--- a/phoneinterface.py
+++ b/phoneinterface.py
@@ -41,7 +41,7 @@ class PhoneEvent(object):
 
     @classmethod
     def string(cls, val):
-        for k, v in vars(cls).iteritems():
+        for k, v in vars(cls).items():
             if v == val:
                 return k
 
@@ -87,12 +87,12 @@ class PhoneInterface(object):
         #self.__core.video_display_enabled = False
 
     def __global_state_changed(self, core, state, msg):
-        print 'Global state changed:', state, msg
+        print('Global state changed:', state, msg)
         # TODO: Do we need events emitted here?
         pass
 
     def __registration_state_changed(self, core, proxyconf, state, msg):
-        print 'Registration state changed:', proxyconf, state, msg
+        print('Registration state changed:', proxyconf, state, msg)
         evt = None
         if state == linphone.RegistrationState.Progress:
             evt = PhoneEvent.RegInProgress
@@ -105,10 +105,10 @@ class PhoneInterface(object):
             for cb in self.__event_cbs:
                 cb(evt)
         else:
-            print 'Unhandled registration state:', linphone.RegistrationState.string(state)
+            print('Unhandled registration state:', linphone.RegistrationState.string(state))
 
     def __call_state_changed(self, core, call, state, msg):
-        print 'Call state changed:', call, state, msg
+        print('Call state changed:', call, state, msg)
         evt = None
         if state == linphone.CallState.IncomingReceived:
             evt = PhoneEvent.CallIncoming
@@ -131,7 +131,7 @@ class PhoneInterface(object):
             for cb in self.__event_cbs:
                 cb(evt)
         else:
-            print 'Unhandled call state:', linphone.CallState.string(state)
+            print('Unhandled call state:', linphone.CallState.string(state))
 
     def __pollthread(self):
         while self.__running:
@@ -199,7 +199,7 @@ class PhoneInterface(object):
             self.__audioproc.terminate()
 
     def read_text(self, text):
-        self.__ttsproc.stdin.write(text + '\n')
+        self.__ttsproc.stdin.write(text.encode('utf8') + b'\n')
         self.__ttsproc.stdin.flush()
 
     def get_remote_number(self):
@@ -207,7 +207,7 @@ class PhoneInterface(object):
 
 if __name__ == '__main__':
     def event_cb(evt):
-        print 'Got event:', PhoneEvent.string(evt)
+        print('Got event:', PhoneEvent.string(evt))
 
     try:
         phone = PhoneInterface('.linphonerc-foo', '.linphonerc')
diff --git a/statemachine.py b/statemachine.py
index d4dbbc9..04825c4 100644
--- a/statemachine.py
+++ b/statemachine.py
@@ -1,5 +1,5 @@
 import threading
-import Queue as queue
+import queue
 
 
 class DialConfiguration(object):
@@ -263,10 +263,10 @@ class DialingState(BaseState):
 
     def on_timeout(self):
         number = self.__number
-        print 'Dialing number:', number
+        print('Dialing number:', number)
         if number in self._controller.dialconfig.shortcuts:
             number = self._controller.dialconfig.shortcuts[number]
-            print 'shortcut resolved:', number
+            print('shortcut resolved:', number)
         self._controller.phone.call(number)
         return ConnectingState