diff --git a/src/components/settings/FallbackHandler/index.tsx b/src/components/settings/FallbackHandler/index.tsx
index 19ab5348e1..3d921be961 100644
--- a/src/components/settings/FallbackHandler/index.tsx
+++ b/src/components/settings/FallbackHandler/index.tsx
@@ -33,7 +33,8 @@ export const FallbackHandler = (): ReactElement | null => {
     return null
   }
 
-  const isOfficial = !!safe.fallbackHandler && safe.fallbackHandler.value === fallbackHandlerDeployment?.defaultAddress
+  const isOfficial =
+    !!safe.fallbackHandler && safe.fallbackHandler.value === fallbackHandlerDeployment?.networkAddresses[safe.chainId]
 
   const tooltip = !safe.fallbackHandler ? (
     <>
diff --git a/src/hooks/coreSDK/safeCoreSDK.ts b/src/hooks/coreSDK/safeCoreSDK.ts
index 155166b3eb..f942e96469 100644
--- a/src/hooks/coreSDK/safeCoreSDK.ts
+++ b/src/hooks/coreSDK/safeCoreSDK.ts
@@ -76,8 +76,8 @@ export const initSafeSDK = async ({
     const safeL1Deployment = getSafeSingletonDeployment({ network: chainId, version: safeVersion })
     const safeL2Deployment = getSafeL2SingletonDeployment({ network: chainId, version: safeVersion })
 
-    isL1SafeMasterCopy = masterCopy === safeL1Deployment?.defaultAddress
-    const isL2SafeMasterCopy = masterCopy === safeL2Deployment?.defaultAddress
+    isL1SafeMasterCopy = masterCopy === safeL1Deployment?.networkAddresses[chainId]
+    const isL2SafeMasterCopy = masterCopy === safeL2Deployment?.networkAddresses[chainId]
 
     // Unknown deployment, which we do not want to support
     if (!isL1SafeMasterCopy && !isL2SafeMasterCopy) {
diff --git a/src/services/security/modules/DelegateCallModule/index.ts b/src/services/security/modules/DelegateCallModule/index.ts
index 489f5a5ab9..e9704a3a17 100644
--- a/src/services/security/modules/DelegateCallModule/index.ts
+++ b/src/services/security/modules/DelegateCallModule/index.ts
@@ -30,7 +30,7 @@ export class DelegateCallModule implements SecurityModule<DelegateCallModuleRequ
     // We need not check for nested delegate calls as we only use MultiSendCallOnly in the UI
     const multiSendDeployment = getMultiSendCallOnlyDeployment({ network: chainId, version: safeVersion ?? undefined })
 
-    return multiSendDeployment?.defaultAddress !== safeTransaction.data.to
+    return multiSendDeployment?.networkAddresses[chainId] !== safeTransaction.data.to
   }
 
   async scanTransaction(request: DelegateCallModuleRequest): Promise<SecurityResponse<DelegateCallModuleResponse>> {