diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/LinkedService.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/LinkedService.json
index fb7c0b820ab3..f2db0c308021 100644
--- a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/LinkedService.json
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/LinkedService.json
@@ -2263,9 +2263,13 @@
           "$ref": "../datafactory.json#/definitions/SecretBase"
         },
         "securityToken": {
-          "description": "The security token is required to remotely access Salesforce instance.",
+          "description": "The security token is optional to remotely access Salesforce instance.",
           "$ref": "../datafactory.json#/definitions/SecretBase"
         },
+        "apiVersion": {
+          "type": "object",
+          "description": "The Salesforce API version used in ADF. Type: string (or Expression with resultType string)."
+        },
         "encryptedCredential": {
           "type": "object",
           "description": "The encrypted credential used for authentication. Credentials are encrypted using the integration runtime credential manager. Type: string (or Expression with resultType string)."
@@ -2308,9 +2312,13 @@
           "$ref": "../datafactory.json#/definitions/SecretBase"
         },
         "securityToken": {
-          "description": "The security token is required to remotely access Salesforce instance.",
+          "description": "The security token is optional to remotely access Salesforce instance.",
           "$ref": "../datafactory.json#/definitions/SecretBase"
         },
+        "apiVersion": {
+          "type": "object",
+          "description": "The Salesforce API version used in ADF. Type: string (or Expression with resultType string)."
+        },
         "extendedProperties": {
           "type": "object",
           "description": "Extended properties appended to the connection string. Type: string (or Expression with resultType string)."