diff --git a/lower-constraints.txt b/lower-constraints.txt
index 7ab29c6964..e14a245640 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -73,7 +73,7 @@ munch==2.2.0
 netaddr==0.7.19
 netifaces==0.10.4
 networkx==1.11
-octavia-lib==1.3.1
+octavia-lib==1.5.0
 openstacksdk==0.12.0
 os-client-config==1.29.0
 os-service-types==1.2.0
diff --git a/octavia/tests/common/sample_data_models.py b/octavia/tests/common/sample_data_models.py
index ecb9d78483..3d6542b38a 100644
--- a/octavia/tests/common/sample_data_models.py
+++ b/octavia/tests/common/sample_data_models.py
@@ -618,6 +618,7 @@ class SampleDriverDataModels(object):
         self.provider_loadbalancer_tree_dict = {
             lib_consts.ADDITIONAL_VIPS: None,
             lib_consts.ADMIN_STATE_UP: True,
+            lib_consts.AVAILABILITY_ZONE: None,
             lib_consts.DESCRIPTION: self.lb_description,
             lib_consts.FLAVOR: {"something": "else"},
             lib_consts.LISTENERS: None,
diff --git a/requirements.txt b/requirements.txt
index 256c4a9fe7..10713a9e7b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ tenacity>=5.0.4  # Apache-2.0
 distro>=1.2.0 # Apache-2.0
 jsonschema>=2.6.0 # MIT
 debtcollector>=1.19.0 # Apache-2.0
-octavia-lib>=1.3.1 # Apache-2.0
+octavia-lib>=1.5.0 # Apache-2.0
 netaddr>=0.7.19 # BSD
 simplejson>=3.13.2 # MIT
 setproctitle>=1.1.10 # BSD