diff --git a/License2Deploy/rolling_deploy.py b/License2Deploy/rolling_deploy.py
index 475db01..f90223d 100644
--- a/License2Deploy/rolling_deploy.py
+++ b/License2Deploy/rolling_deploy.py
@@ -23,7 +23,8 @@ def __init__(self,
                session=None,
                creation_wait=[10, 60],
                ready_wait=[10, 30],
-               health_wait=[10, 30]):
+               health_wait=[10, 30],
+               only_new_wait=[10, 30]):
     self.env = env
     self.session = session
     self.project = project.replace('-','')
@@ -46,6 +47,7 @@ def __init__(self,
     self.creation_wait = creation_wait
     self.ready_wait = ready_wait
     self.health_wait = health_wait
+    self.only_new_wait = only_new_wait
 
   def get_ami_id_state(self, ami_id):
     try:
@@ -201,19 +203,23 @@ def lb_healthcheck(self, new_ids):
     else:
       logging.info('ELB healthcheck OK')
       return True
-
-  def confirm_lb_has_only_new_instances(self, wait_time=60):
-    ''' Confirm that only new instances with the current build tag are in the load balancer '''
-    sleep(wait_time) # Allotting time for the instances to shut down
+  
+  def only_new_instances_check(self):
     instance_ids = self.conn_elb.describe_instance_health(self.load_balancer)
     for instance in instance_ids:
       build = self.conn_ec2.get_all_reservations(instance.instance_id)[0].instances[0].tags['BUILD']
       if build != self.build_number:
-        logging.error("There is still an old instance in the ELB: {0}. Please investigate".format(instance))
-        exit(self.exit_error_code)
+        raise Exception("There is still an old instance in the ELB: {0}.".format(instance))
     logging.info("Deployed instances {0} to ELB: {1}".format(instance_ids, self.load_balancer))
     return instance_ids
 
+  def confirm_lb_has_only_new_instances(self):
+    try:
+      return retry_call(self.only_new_instances_check, tries=self.only_new_wait[0], delay=self.only_new_wait[1], logger=logging)
+    except Exception as e:
+      logging.error("There are still old instances in the ELB. Please investigate.")
+      exit(self.exit_error_code)
+
   def tag_ami(self, ami_id, env):
     ''' Tagging AMI with DEPLOYED tag '''
     try:
@@ -336,12 +342,13 @@ def get_args(): # pragma: no cover
   parser.add_argument('-C', '--creation-wait', action='store', dest='creation_wait', help='Wait time for ec2 instance creation', type=int, nargs=2, default=[10, 60])
   parser.add_argument('-r', '--ready-wait', action='store', dest='ready_wait', help='Wait time for ec2 instance to be ready', type=int, nargs=2, default=[10, 30])
   parser.add_argument('-H', '--health-wait', action='store', dest='health_wait', help='Wait time for ec2 instance health check', type=int, nargs=2, default=[10, 30])
+  parser.add_argument('-o', '--only-new-wait', action='store', dest='only_new_wait', help='Wait time for old ec2 instances to terminate', type=int, nargs=2, default=[10, 30])
   return parser.parse_args()
 
 def main(): # pragma: no cover
   args = get_args()
   SetLogging.setup_logging()
-  deployObj = RollingDeploy(args.env, args.project, args.build_number, args.ami_id, args.profile, args.config, args.stack_name, None, args.creation_wait, args.ready_wait, args.health_wait)
+  deployObj = RollingDeploy(args.env, args.project, args.build_number, args.ami_id, args.profile, args.config, args.stack_name, None, args.creation_wait, args.ready_wait, args.health_wait, args.only_new_wait)
   deployObj.deploy()
   
 if __name__ == "__main__": # pragma: no cover
diff --git a/README.md b/README.md
index a18ab5e..88c4725 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Usage
 ```
 usage: rolling_deploy.py [-h] -e ENV -p PROJECT -b BUILD_NUM -a AMI_ID
                          [-P PROFILE] [-c CONFIG] [-s STACK_NAME]
-                         [-C CREATION_WAIT] [-r READY_WAIT] [-H HEALTH_WAIT]
+                         [-C CREATION_WAIT] [-r READY_WAIT] [-H HEALTH_WAIT] [-o ONLY_NEW_WAIT]
 
 optional arguments:
   -h, --help            show this help message and exit
@@ -54,6 +54,10 @@ optional arguments:
                         Time to wait for EC2 instances to be health checked
                         (# of tries, interval of each try in seconds), default (10, 30)
                         e.g. -H 10 30
+  -o ONLY_NEW_WAIT, --only-new-wait ONLY_NEW_WAIT
+                        Time to wait for old EC2 instances to terminate
+                        (# of tries, interval of each try in seconds), default (10, 30)
+                        e.g. -o 10 30
 ```
 Requirements
 ==================
diff --git a/tests/rolling_deploy_test.py b/tests/rolling_deploy_test.py
index 4571161..dfe0103 100644
--- a/tests/rolling_deploy_test.py
+++ b/tests/rolling_deploy_test.py
@@ -205,7 +205,7 @@ def test_wait_ami_availability(self):
   def test_confirm_lb_has_only_new_instances(self):
     instance_ids = self.setUpEC2()[1]
     self.rolling_deploy.load_balancer = self.rolling_deploy.get_lb()
-    self.assertEqual(len(instance_ids), len(self.rolling_deploy.confirm_lb_has_only_new_instances(1))) #Return All LB's with the proper build number
+    self.assertEqual(len(instance_ids), len(self.rolling_deploy.confirm_lb_has_only_new_instances())) #Return All LB's with the proper build number
 
   @mock_elb
   def test_get_lb(self):