diff --git a/src/cmd/deploy.ts b/src/cmd/deploy.ts
index 3d668e3..8fc8bd4 100644
--- a/src/cmd/deploy.ts
+++ b/src/cmd/deploy.ts
@@ -28,6 +28,7 @@ import {
   getNetworkClient,
   isDefenderId,
   removeDefenderIdReferences,
+  isForkedNetwork,
 } from '../utils';
 import {
   DefenderAction,
@@ -53,6 +54,7 @@ import {
   DefenderBlockMonitorResponse,
   Resources,
   DefenderForkedNetwork,
+  DefenderBlockWatcher,
 } from '../types';
 import keccak256 from 'keccak256';
 import {
@@ -808,9 +810,16 @@ export default class DefenderDeploy {
             monitor.type = match.type;
           }
 
-          const blockwatchersForNetwork = (await client.listBlockwatchers()).filter(
-            (b) => b.network === monitor.network,
-          );
+          let blockwatchersForNetwork: DefenderBlockWatcher[] = [];
+
+          // Check if network is forked network
+          if (isForkedNetwork(monitor.network)) {
+            blockwatchersForNetwork = (await client.listTenantBlockwatchers()).filter(
+              (b) => b.network === monitor.network,
+            );
+          } else {
+            blockwatchersForNetwork = (await client.listBlockwatchers()).filter((b) => b.network === monitor.network);
+          }
 
           const newMonitor = constructMonitor(
             this.serverless,
@@ -895,9 +904,17 @@ export default class DefenderDeploy {
         },
         // on create
         async (monitor: Monitor, stackResourceId: string) => {
-          const blockwatchersForNetwork = (await client.listBlockwatchers()).filter(
-            (b) => b.network === monitor.network,
-          );
+          let blockwatchersForNetwork: DefenderBlockWatcher[] = [];
+
+          // Check if network is forked network
+          if (isForkedNetwork(monitor.network)) {
+            blockwatchersForNetwork = (await client.listTenantBlockwatchers()).filter(
+              (b) => b.network === monitor.network,
+            );
+          } else {
+            blockwatchersForNetwork = (await client.listBlockwatchers()).filter((b) => b.network === monitor.network);
+          }
+
           const createdMonitor = await client.create(
             constructMonitor(
               this.serverless,
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 548b63a..91ebce2 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -2,6 +2,7 @@ import Serverless from 'serverless';
 
 import _ from 'lodash';
 
+import { ForkedNetwork, Network, isValidNetwork } from '@openzeppelin/defender-sdk-base-client';
 import { ActionClient } from '@openzeppelin/defender-sdk-action-client';
 import { MonitorClient } from '@openzeppelin/defender-sdk-monitor-client';
 import { RelayClient } from '@openzeppelin/defender-sdk-relay-client';
@@ -534,3 +535,8 @@ export const removeDefenderIdReferences = <Y>(resources: { [k: string]: Y | Defe
   }
   return resources as { [k: string]: Y } | undefined;
 };
+
+export const isForkedNetwork = (network?: Network): network is ForkedNetwork => {
+  if (!network) return false;
+  return !isValidNetwork(network);
+};