diff --git a/public/api/conf/1.0/application.yaml b/public/api/conf/1.0/application.yaml
index 38c39fa..ec4dfc4 100644
--- a/public/api/conf/1.0/application.yaml
+++ b/public/api/conf/1.0/application.yaml
@@ -128,6 +128,25 @@ paths:
                     code: FORBIDDEN
       deprecated: false
 components:
+  parameters:
+    acceptHeader:
+      name: Accept
+      in: header
+      description: "Specifies the response format and the version of the API to be used. For example: application/vnd.hmrc.2.0+json"
+      schema:
+        type: string
+        enum: [
+          "application/vnd.hmrc.2.0+json",
+          "application/vnd.hmrc.2.0+xml"
+        ]
+      required: true
+    authorizationHeader:
+      name: Authorization
+      in: header
+      description: "An OAuth 2.0 Bearer Token"
+      schema:
+        type: string
+      required: true
   schemas:
     errorResponse:
       title: errorResponse
diff --git a/public/api/conf/1.1/application.yaml b/public/api/conf/1.1/application.yaml
index 0205b50..385140e 100644
--- a/public/api/conf/1.1/application.yaml
+++ b/public/api/conf/1.1/application.yaml
@@ -27,7 +27,9 @@ paths:
       summary: Get user information
       description: Retrieves OpenID Connect compliant information about the signed-in user
       operationId: Getuserinformation
-      parameters: []
+      parameters:
+        - $ref: '#/components/parameters/authorizationHeader'
+        - $ref: '#/components/parameters/acceptHeader'
       responses:
         '200':
           description: ''
@@ -132,6 +134,25 @@ paths:
                     code: FORBIDDEN
       deprecated: false
 components:
+  parameters:
+    acceptHeader:
+      name: Accept
+      in: header
+      description: "Specifies the response format and the version of the API to be used. For example: application/vnd.hmrc.2.0+json"
+      schema:
+        type: string
+        enum: [
+          "application/vnd.hmrc.2.0+json",
+          "application/vnd.hmrc.2.0+xml"
+        ]
+      required: true
+    authorizationHeader:
+      name: Authorization
+      in: header
+      description: "An OAuth 2.0 Bearer Token"
+      schema:
+        type: string
+      required: true
   schemas:
     errorResponse:
       title: errorResponse