diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-03-01/azureFirewall.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-03-01/azureFirewall.json
index a0c618fa8c87..470fa44686ea 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-03-01/azureFirewall.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-03-01/azureFirewall.json
@@ -1071,7 +1071,8 @@
           "description": "Tier of an Azure Firewall.",
           "enum": [
             "Standard",
-            "Premium"
+            "Premium",
+            "Basic"
           ],
           "x-ms-enum": {
             "name": "AzureFirewallSkuTier",
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-03-01/firewallPolicy.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-03-01/firewallPolicy.json
index 639a4c53043a..4a4233553360 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-03-01/firewallPolicy.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-03-01/firewallPolicy.json
@@ -1424,7 +1424,8 @@
           "description": "Tier of Firewall Policy.",
           "enum": [
             "Standard",
-            "Premium"
+            "Premium",
+            "Basic"
           ],
           "x-ms-enum": {
             "name": "FirewallPolicySkuTier",