diff --git a/kallithea/lib/pidlock.py b/kallithea/lib/pidlock.py
--- a/kallithea/lib/pidlock.py
+++ b/kallithea/lib/pidlock.py
@@ -12,7 +12,6 @@
 # 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 with_statement
 import os
 import errno