diff --git a/spec/namespaces/indices.yaml b/spec/namespaces/indices.yaml
index f95b9343b..b693a2604 100644
--- a/spec/namespaces/indices.yaml
+++ b/spec/namespaces/indices.yaml
@@ -3837,7 +3837,6 @@ components:
         Comma-separated list of data streams, indices, and aliases used to limit the request.
         Supports wildcards (`*`).
         To target all data streams and indices, omit this parameter or use `*` or `_all`.
-      required: true
       schema:
         $ref: '../schemas/_common.yaml#/components/schemas/Indices'
       style: simple