diff --git a/azure-mgmt-network/azure/mgmt/network/v2018_08_01/models/network_management_client_enums.py b/azure-mgmt-network/azure/mgmt/network/v2018_08_01/models/network_management_client_enums.py
index ac671a6caeec..de6ee4966447 100644
--- a/azure-mgmt-network/azure/mgmt/network/v2018_08_01/models/network_management_client_enums.py
+++ b/azure-mgmt-network/azure/mgmt/network/v2018_08_01/models/network_management_client_enums.py
@@ -219,6 +219,7 @@ class AzureFirewallNetworkRuleProtocol(str, Enum):
     tcp = "TCP"
     udp = "UDP"
     any = "Any"
+    icmp = "ICMP"
 
 
 class AuthorizationUseStatus(str, Enum):