diff --git a/specification/automation/resource-manager/Microsoft.Automation/stable/2018-06-30/runbook.json b/specification/automation/resource-manager/Microsoft.Automation/stable/2018-06-30/runbook.json
index 46df5d6fb89d..0c215f28ea28 100644
--- a/specification/automation/resource-manager/Microsoft.Automation/stable/2018-06-30/runbook.json
+++ b/specification/automation/resource-manager/Microsoft.Automation/stable/2018-06-30/runbook.json
@@ -129,7 +129,8 @@
             "in": "body",
             "required": true,
             "schema": {
-              "type": "string"
+              "type": "object",
+              "format": "file"
             },
             "description": "The runbook draft content."
           },
@@ -141,7 +142,7 @@
           "200": {
             "description": "OK",
             "schema": {
-              "type": "string"
+              "type": "file"
             }
           },
           "202": {
@@ -366,7 +367,7 @@
           "200": {
             "description": "OK",
             "schema": {
-              "type": "string"
+              "type": "file"
             }
           },
           "default": {