diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
index d7108076fc23..dff6c6cb4dcf 100644
--- a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
@@ -4841,6 +4841,36 @@
         }
       }
     },
+    "MongoDbAtlasSink": {
+      "description": "A copy activity MongoDB Atlas sink.",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/CopySink"
+        }
+      ],
+      "properties": {
+        "writeBehavior": {
+          "type": "object",
+          "description": "Specifies whether the document with same key to be overwritten (upsert) rather than throw exception (insert). The default value is \"insert\". Type: string (or Expression with resultType string). Type: string (or Expression with resultType string)."
+        }
+      }
+    },
+    "MongoDbV2Sink": {
+      "description": "A copy activity MongoDB sink.",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/CopySink"
+        }
+      ],
+      "properties": {
+        "writeBehavior": {
+          "type": "object",
+          "description": "Specifies whether the document with same key to be overwritten (upsert) rather than throw exception (insert). The default value is \"insert\". Type: string (or Expression with resultType string). Type: string (or Expression with resultType string)."
+        }
+      }
+    },
     "CosmosDbMongoDbApiSink": {
       "description": "A copy activity sink for a CosmosDB (MongoDB API) database.",
       "type": "object",