diff --git a/nailgun/nailgun/api/v1/validators/json_schema/base_types.py b/nailgun/nailgun/api/v1/validators/json_schema/base_types.py
index 2a07a240af..d5bf9f72cb 100644
--- a/nailgun/nailgun/api/v1/validators/json_schema/base_types.py
+++ b/nailgun/nailgun/api/v1/validators/json_schema/base_types.py
@@ -282,16 +282,16 @@ ALLOWED_VALUES_SCHEMA = {
 MULTIPLE_TEXT_FIELDS_SCHEMA = {
     'value': {
         'type': 'array',
-        'minItems': 1,
+        'minItems': 0,
         'items': {'type': 'string'},
     },
     'min': {
         'type': 'integer',
-        'minimum': 1,
+        'minimum': 0,
     },
     'max': {
         'type': 'integer',
-        'minimum': 1,
+        'minimum': 0,
     }
 }
 
diff --git a/nailgun/nailgun/fixtures/openstack.yaml b/nailgun/nailgun/fixtures/openstack.yaml
index 4fd9efe32b..c9cad755ed 100644
--- a/nailgun/nailgun/fixtures/openstack.yaml
+++ b/nailgun/nailgun/fixtures/openstack.yaml
@@ -1305,6 +1305,7 @@
             description: "List of upstream DNS servers"
             weight: 10
             type: "text_list"
+            min: 0
             max: 3
             regex:
               source: &ipv4_regex '^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$'