diff --git a/kloudbuster/kb_runner_base.py b/kloudbuster/kb_runner_base.py
index c9e7930..279891b 100644
--- a/kloudbuster/kb_runner_base.py
+++ b/kloudbuster/kb_runner_base.py
@@ -88,7 +88,7 @@ class KBRunner(object):
                 continue
             break
         if not success:
-            LOG.error("Error: Cannot connect to the Redis server")
+            LOG.error("Cannot connect to the Redis server.")
             raise KBProxyConnectionException()
 
         # Subscribe to message channel
diff --git a/requirements.txt b/requirements.txt
index 8b26127..0e9e1bd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,6 +14,7 @@ oslo.log>=1.0.0
 pecan>=0.9.0
 redis>=2.10.3
 tabulate>=0.7.3
+pytz>=2016.4
 
 # Workaround for pip install failed on RHEL/CentOS
 functools32>=3.2.3