diff --git a/openapi.yaml b/openapi.yaml
index d2616e9c6..a56a7970e 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -3467,9 +3467,7 @@ paths:
           content:
             application/json:
               schema:
-                type: array
-                items:
-                  $ref: '#/components/schemas/PrivateKey'
+                $ref: '#/components/schemas/PrivateKey'
         '401':
           $ref: '#/components/responses/401'
         '400':