diff --git a/inventory_provider/config.py b/inventory_provider/config.py
index 23384f920165dacf2b7d83fd705b03fd2c69ba1b..f6762d7dc3d55d12b57488dae844c1d143a1f137 100644
--- a/inventory_provider/config.py
+++ b/inventory_provider/config.py
@@ -184,11 +184,16 @@ CONFIG_SCHEMA = {
             'items': {'$ref': '#/definitions/gws-direct-nren-isp'}
         },
         'nren-asn-map': {
-            'type': 'object',
-            'patternProperties': {
-                r'^\d+$': {'type': 'string'}
+            'type': 'array',
+            'items': {
+                'type': 'object',
+                'properties': {
+                  'nren': {'type': 'string'},
+                  'asn': {'type': 'integer'}
+                },
+                'required': ['nren', 'asn'],
+                'additionalProperties': False
             },
-            'additionalProperties': False
         }
     },
 
diff --git a/inventory_provider/routes/msr.py b/inventory_provider/routes/msr.py
index 6e251e56dc9eaca4b5243a082d6241e7e30f6c99..db0ad757efb3b00620278e1b4a7e7ea2c18ca253 100644
--- a/inventory_provider/routes/msr.py
+++ b/inventory_provider/routes/msr.py
@@ -1057,9 +1057,9 @@ def mdvpn():
     config = current_app.config['INVENTORY_PROVIDER_CONFIG']
     nren_asn_map = config['nren-asn-map']
     nren_details = [
-        _peerings_for_nren(int(asn),
+        _peerings_for_nren(pair['asn'],
                            bgplu_index,
                            vpnrr_index)
-        for asn in nren_asn_map]
+        for pair in nren_asn_map]
     response = json.dumps(nren_details)
     return Response(response, mimetype='application/json')
diff --git a/test/conftest.py b/test/conftest.py
index b54d49f586a540db0d4683c1b83cd1f322d649ff..af538eb3146301749989bc69d6fad04e327f7184 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -66,11 +66,20 @@ def data_config_filename():
                 }
             ],
             'gws-direct': {},
-            'nren-asn-map': {
-                "1930": "FOO",
-                "680": "BAR",
-                "2200": "BAT"
-            }
+            'nren-asn-map': [
+                {
+                    "nren": "FOO",
+                    "asn": 1930
+                },
+                {
+                    "nren": "BAR",
+                    "asn": 680
+                },
+                {
+                    "nren": "BAT",
+                    "asn": 2200
+                }
+            ]
         }
 
         with open(os.path.join(TEST_DATA_DIRNAME, 'gws-direct.json')) as gws: