diff --git a/src/metadata/v54.json b/src/metadata/v54.json
index 45f8796a..da018ece 100644
--- a/src/metadata/v54.json
+++ b/src/metadata/v54.json
@@ -1313,6 +1313,25 @@
       }
     ]
   },
+  {
+    "childXmlNames": [
+      "MarketingAppExtActivity"
+    ],
+    "directoryName": "marketingappextensions",
+    "inFolder": false,
+    "metaFile": false,
+    "suffix": "marketingappextension",
+    "xmlName": "MarketingAppExtension"
+  },
+  {
+    "directoryName": "marketingappextensions.marketingAppExtActivities",
+    "inFolder": false,
+    "metaFile": false,
+    "parentXmlName": "MarketingAppExtension",
+    "xmlName": "MarketingAppExtActivity",
+    "xmlTag": "marketingAppExtActivities",
+    "key": "fullName"
+  },
   {
     "childXmlNames": [
       "WorkflowFieldUpdate",
diff --git a/src/metadata/v55.json b/src/metadata/v55.json
index c9d839a7..05f31ea9 100644
--- a/src/metadata/v55.json
+++ b/src/metadata/v55.json
@@ -1404,6 +1404,25 @@
       }
     ]
   },
+  {
+    "childXmlNames": [
+      "MarketingAppExtActivity"
+    ],
+    "directoryName": "marketingappextensions",
+    "inFolder": false,
+    "metaFile": false,
+    "suffix": "marketingappextension",
+    "xmlName": "MarketingAppExtension"
+  },
+  {
+    "directoryName": "marketingappextensions.marketingAppExtActivities",
+    "inFolder": false,
+    "metaFile": false,
+    "parentXmlName": "MarketingAppExtension",
+    "xmlName": "MarketingAppExtActivity",
+    "xmlTag": "marketingAppExtActivities",
+    "key": "fullName"
+  },
   {
     "childXmlNames": [
       "WorkflowFieldUpdate",
diff --git a/src/metadata/v56.json b/src/metadata/v56.json
index 1173f22f..ed4dcbf1 100644
--- a/src/metadata/v56.json
+++ b/src/metadata/v56.json
@@ -1432,6 +1432,25 @@
       }
     ]
   },
+  {
+    "childXmlNames": [
+      "MarketingAppExtActivity"
+    ],
+    "directoryName": "marketingappextensions",
+    "inFolder": false,
+    "metaFile": false,
+    "suffix": "marketingappextension",
+    "xmlName": "MarketingAppExtension"
+  },
+  {
+    "directoryName": "marketingappextensions.marketingAppExtActivities",
+    "inFolder": false,
+    "metaFile": false,
+    "parentXmlName": "MarketingAppExtension",
+    "xmlName": "MarketingAppExtActivity",
+    "xmlTag": "marketingAppExtActivities",
+    "key": "fullName"
+  },
   {
     "childXmlNames": [
       "WorkflowFieldUpdate",
diff --git a/src/metadata/v57.json b/src/metadata/v57.json
index c9ab5f72..32bd365c 100644
--- a/src/metadata/v57.json
+++ b/src/metadata/v57.json
@@ -1474,6 +1474,25 @@
       }
     ]
   },
+  {
+    "childXmlNames": [
+      "MarketingAppExtActivity"
+    ],
+    "directoryName": "marketingappextensions",
+    "inFolder": false,
+    "metaFile": false,
+    "suffix": "marketingappextension",
+    "xmlName": "MarketingAppExtension"
+  },
+  {
+    "directoryName": "marketingappextensions.marketingAppExtActivities",
+    "inFolder": false,
+    "metaFile": false,
+    "parentXmlName": "MarketingAppExtension",
+    "xmlName": "MarketingAppExtActivity",
+    "xmlTag": "marketingAppExtActivities",
+    "key": "fullName"
+  },
   {
     "childXmlNames": [
       "WorkflowFieldUpdate",
diff --git a/src/metadata/v58.json b/src/metadata/v58.json
index f3340c80..3e013d62 100644
--- a/src/metadata/v58.json
+++ b/src/metadata/v58.json
@@ -1474,6 +1474,25 @@
       }
     ]
   },
+  {
+    "childXmlNames": [
+      "MarketingAppExtActivity"
+    ],
+    "directoryName": "marketingappextensions",
+    "inFolder": false,
+    "metaFile": false,
+    "suffix": "marketingappextension",
+    "xmlName": "MarketingAppExtension"
+  },
+  {
+    "directoryName": "marketingappextensions.marketingAppExtActivities",
+    "inFolder": false,
+    "metaFile": false,
+    "parentXmlName": "MarketingAppExtension",
+    "xmlName": "MarketingAppExtActivity",
+    "xmlTag": "marketingAppExtActivities",
+    "key": "fullName"
+  },
   {
     "childXmlNames": [
       "WorkflowFieldUpdate",
diff --git a/src/metadata/v59.json b/src/metadata/v59.json
index f3340c80..3e013d62 100644
--- a/src/metadata/v59.json
+++ b/src/metadata/v59.json
@@ -1474,6 +1474,25 @@
       }
     ]
   },
+  {
+    "childXmlNames": [
+      "MarketingAppExtActivity"
+    ],
+    "directoryName": "marketingappextensions",
+    "inFolder": false,
+    "metaFile": false,
+    "suffix": "marketingappextension",
+    "xmlName": "MarketingAppExtension"
+  },
+  {
+    "directoryName": "marketingappextensions.marketingAppExtActivities",
+    "inFolder": false,
+    "metaFile": false,
+    "parentXmlName": "MarketingAppExtension",
+    "xmlName": "MarketingAppExtActivity",
+    "xmlTag": "marketingAppExtActivities",
+    "key": "fullName"
+  },
   {
     "childXmlNames": [
       "WorkflowFieldUpdate",
diff --git a/src/service/typeHandlerFactory.ts b/src/service/typeHandlerFactory.ts
index 28f06bc0..1b557fc3 100644
--- a/src/service/typeHandlerFactory.ts
+++ b/src/service/typeHandlerFactory.ts
@@ -36,6 +36,7 @@ const handlerMap = {
   labels: InFile,
   listViews: SubCustomObject,
   lwc: LwcHandler,
+  marketingappextensions: InFile,
   matchingRules: InFile,
   moderation: SharedFolder,
   objects: CustomObject,