diff --git a/2013-05/requirements.txt b/2013-05/requirements.txt
index b3fe1f1..e3ce9ad 100644
--- a/2013-05/requirements.txt
+++ b/2013-05/requirements.txt
@@ -12,7 +12,7 @@ Jinja2==2.6
 Werkzeug==0.8.3
 path.py==2.4.1
 CherryPy==3.2.2
-python-ldap==2.4.10
+python-ldap==3.4.0
 blinker==1.2
 python-dateutil==2.1
 six==1.2.0