diff --git a/kallithea/lib/pidlock.py b/kallithea/lib/pidlock.py
--- a/kallithea/lib/pidlock.py
+++ b/kallithea/lib/pidlock.py
@@ -12,6 +12,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from __future__ import print_function
+
 import errno
 import os
 from multiprocessing.util import Finalize
@@ -50,7 +52,7 @@ class DaemonLock(object):
     def _on_finalize(lock, debug):
         if lock.held:
             if debug:
-                print 'lock held finalizing and running lock.release()'
+                print('lock held finalizing and running lock.release()')
             lock.release()
 
     def lock(self):
@@ -60,7 +62,7 @@ class DaemonLock(object):
         """
         lockname = str(os.getpid())
         if self.debug:
-            print 'running lock'
+            print('running lock')
         self.trylock()
         self.makelock(lockname, self.pidfile)
         return True
@@ -68,7 +70,7 @@ class DaemonLock(object):
     def trylock(self):
         running_pid = False
         if self.debug:
-            print 'checking for already running process'
+            print('checking for already running process')
         try:
             with open(self.pidfile, 'r') as f:
                 try:
@@ -77,8 +79,8 @@ class DaemonLock(object):
                     running_pid = -1
 
             if self.debug:
-                print ('lock file present running_pid: %s, '
-                       'checking for execution' % (running_pid,))
+                print('lock file present running_pid: %s, '
+                      'checking for execution' % (running_pid,))
             # Now we check the PID from lock file matches to the current
             # process PID
             if running_pid:
@@ -88,13 +90,13 @@ class DaemonLock(object):
                     if exc.errno in (errno.ESRCH, errno.EPERM):
                         print ("Lock File is there but"
                                " the program is not running")
-                        print "Removing lock file for the: %s" % running_pid
+                        print("Removing lock file for the: %s" % running_pid)
                         self.release()
                     else:
                         raise
                 else:
-                    print "You already have an instance of the program running"
-                    print "It is running as process %s" % running_pid
+                    print("You already have an instance of the program running")
+                    print("It is running as process %s" % running_pid)
                     raise LockHeld()
 
         except IOError as e:
@@ -105,21 +107,21 @@ class DaemonLock(object):
         """releases the pid by removing the pidfile
         """
         if self.debug:
-            print 'trying to release the pidlock'
+            print('trying to release the pidlock')
 
         if self.callbackfn:
             #execute callback function on release
             if self.debug:
-                print 'executing callback function %s' % self.callbackfn
+                print('executing callback function %s' % self.callbackfn)
             self.callbackfn()
         try:
             if self.debug:
-                print 'removing pidfile %s' % self.pidfile
+                print('removing pidfile %s' % self.pidfile)
             os.remove(self.pidfile)
             self.held = False
         except OSError as e:
             if self.debug:
-                print 'removing pidfile failed %s' % e
+                print('removing pidfile failed %s' % e)
             pass
 
     def makelock(self, lockname, pidfile):
@@ -130,7 +132,7 @@ class DaemonLock(object):
         :param pidfile: the file to write the pid in
         """
         if self.debug:
-            print 'creating a file %s and pid: %s' % (pidfile, lockname)
+            print('creating a file %s and pid: %s' % (pidfile, lockname))
 
         dir_, file_ = os.path.split(pidfile)
         if not os.path.isdir(dir_):