diff --git a/openapi.yml b/openapi.yml
index 68b51d4..f420aaa 100644
--- a/openapi.yml
+++ b/openapi.yml
@@ -8071,6 +8071,8 @@ paths:
             Accept: application/vnd.dwolla.v1.hal+json
             Content-Type: application/vnd.dwolla.v1.hal+json
             Authorization: Bearer {Your access token}
+      parameters:
+        - $ref: '#/components/parameters/Accept'
       requestBody:
         required: false
         description: Optional JSON body. Typically empty; presence of body is not required.
diff --git a/specs/resources/sandbox-simulations.yml b/specs/resources/sandbox-simulations.yml
index 1071cb7..ea9f3fc 100644
--- a/specs/resources/sandbox-simulations.yml
+++ b/specs/resources/sandbox-simulations.yml
@@ -15,6 +15,8 @@ post:
         Accept: application/vnd.dwolla.v1.hal+json
         Content-Type: application/vnd.dwolla.v1.hal+json
         Authorization: Bearer {Your access token}
+  parameters:
+    - $ref: '../schemas/common.yml#/components/parameters/Accept'
   requestBody:
     required: false
     description: Optional JSON body. Typically empty; presence of body is not required.