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 97748e0a2bec..2e7e4875fa51 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
@@ -7167,7 +7167,7 @@
           "type": "object",
           "description": "Represents the headers that will be sent to the request. For example, to set the language and type on a request: \"headers\" : { \"Accept-Language\": \"en-us\", \"Content-Type\": \"application/json\" }. Type: string (or Expression with resultType string).",
           "additionalProperties": {
-            "type": "string",
+            "type": "object",
             "x-ms-format": "dfe-string"
           }
         },
@@ -8208,7 +8208,7 @@
           "type": "object",
           "description": "Represents the headers that will be sent to the request. For example, to set the language and type on a request: \"headers\" : { \"Accept-Language\": \"en-us\", \"Content-Type\": \"application/json\" }. Type: string (or Expression with resultType string).",
           "additionalProperties": {
-            "type": "string",
+            "type": "object",
             "x-ms-format": "dfe-string"
           }
         },
@@ -8277,7 +8277,7 @@
           "type": "object",
           "description": "Represents the headers that will be sent to the request. For example, to set the language and type on a request: \"headers\" : { \"Accept-Language\": \"en-us\", \"Content-Type\": \"application/json\" }. Type: string (or Expression with resultType string).",
           "additionalProperties": {
-            "type": "string",
+            "type": "object",
             "x-ms-format": "dfe-string"
           }
         },