diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2019-09-01/virtualRouter.json b/specification/network/resource-manager/Microsoft.Network/stable/2019-09-01/virtualRouter.json
index 27c7c36ee0de..65c78fd7785b 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2019-09-01/virtualRouter.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2019-09-01/virtualRouter.json
@@ -693,7 +693,7 @@
           "type": "integer",
           "readOnly": false,
           "format": "int64",
-          "minimum": 1,
+          "minimum": 0,
           "maximum": 4294967295,
           "description": "VirtualRouter ASN."
         },
@@ -766,7 +766,7 @@
           "type": "integer",
           "readOnly": false,
           "format": "int64",
-          "minimum": 1,
+          "minimum": 0,
           "maximum": 4294967295,
           "description": "Peer ASN."
         },