diff --git a/static/api-specs/idn/beta/schemas/DomainStatusDto.yaml b/static/api-specs/idn/beta/schemas/DomainStatusDto.yaml
index 4ec1f3393..54819fc57 100644
--- a/static/api-specs/idn/beta/schemas/DomainStatusDto.yaml
+++ b/static/api-specs/idn/beta/schemas/DomainStatusDto.yaml
@@ -14,6 +14,8 @@ properties:
     description: DKIM is enabled for this domain
   dkimTokens:
     type: array
+    items:
+      type: string
     example: ["token1", "token2", "token3"]
     description: DKIM tokens required for authentication
   dkimVerificationStatus: