diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2020-03-01/azureFirewall.json b/specification/network/resource-manager/Microsoft.Network/stable/2020-03-01/azureFirewall.json
index 6dfedcd10e8b..9865e7225956 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2020-03-01/azureFirewall.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2020-03-01/azureFirewall.json
@@ -272,6 +272,9 @@
           }
         ],
         "responses": {
+          "202": {
+            "description": "Accepted and the operation will complete asynchronously."
+          },
           "200": {
             "description": "Update successful. The operation returns the resulting AzureFirewall resource.",
             "schema": {
@@ -289,6 +292,10 @@
           "Update Azure Firewall Tags": {
             "$ref": "./examples/AzureFirewallUpdateTags.json"
           }
+        },
+        "x-ms-long-running-operation": true,
+        "x-ms-long-running-operation-options": {
+          "final-state-via": "azure-async-operation"
         }
       }
     },
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2020-03-01/examples/AzureFirewallUpdateTags.json b/specification/network/resource-manager/Microsoft.Network/stable/2020-03-01/examples/AzureFirewallUpdateTags.json
index b054f846f5df..a4423f65d143 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2020-03-01/examples/AzureFirewallUpdateTags.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2020-03-01/examples/AzureFirewallUpdateTags.json
@@ -12,6 +12,7 @@
     }
   },
   "responses": {
+    "202": {},
     "200": {
       "body": {
         "name": "fw1",