diff --git a/README.rst b/README.rst
index 5a17cc2..5dc888e 100644
--- a/README.rst
+++ b/README.rst
@@ -99,6 +99,7 @@ Authentication settings:
 
 * ``CAS_SLO_MAX_PARALLEL_REQUESTS``: Maximum number of parallel single log out requests send.
   If more requests need to be send, there are queued. The default is ``10``.
+* ``CAS_SLO_TIMEOUT``: Timeout for a single SLO request in seconds. The default is ``5``.
 
 Tickets validity settings:
 
diff --git a/cas_server/default_settings.py b/cas_server/default_settings.py
index b1d4333..139569d 100644
--- a/cas_server/default_settings.py
+++ b/cas_server/default_settings.py
@@ -59,6 +59,8 @@ setting_default('CAS_PROXY_GRANTING_TICKET_IOU_PREFIX', 'PGTIOU')
 # Maximum number of parallel single log out requests send
 # if more requests need to be send, there are queued
 setting_default('CAS_SLO_MAX_PARALLEL_REQUESTS', 10)
+# SLO request timeout.
+setting_default('CAS_SLO_TIMEOUT', 5)
 
 setting_default('CAS_SQL_HOST', 'localhost')
 setting_default('CAS_SQL_USERNAME', '')
diff --git a/cas_server/models.py b/cas_server/models.py
index 8fa1488..3867d2f 100644
--- a/cas_server/models.py
+++ b/cas_server/models.py
@@ -405,6 +405,7 @@ class Ticket(models.Model):
                     session.post(
                         url.encode('utf-8'),
                         data={'logoutRequest': xml.encode('utf-8')},
+                        timeout=settings.CAS_SLO_TIMEOUT
                     )
                 )
             except Exception as error: