diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c0e54b..e3e4b46 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/).
 
 ### Unreleased
 
+### [0.9.1] - 2026-07-24
+
+- group.get: always return array
+- zone: add include_subgroups
+
 ### [0.9.0] - 2026-07-20
 
 - feat: add nameserver type native
@@ -138,3 +143,4 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/).
 [0.8.9]: https://github.com/NicTool/validate/releases/tag/v0.8.9
 [0.8.10]: https://github.com/NicTool/validate/releases/tag/v0.8.10
 [0.9.0]: https://github.com/NicTool/validate/releases/tag/v0.9.0
+[0.9.1]: https://github.com/NicTool/validate/releases/tag/v0.9.1
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 4d55feb..d5cd48f 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -2,7 +2,7 @@
 
 This handcrafted artisanal software is brought to you by:
 
-| <img height="80" src="https://avatars.githubusercontent.com/u/261635?v=4"><br><a href="https://github.com/msimerson">msimerson</a> (<a href="https://github.com/NicTool/validate/commits?author=msimerson">30</a>) | <img height="80" src="https://avatars.githubusercontent.com/u/258583966?v=4"><br><a href="https://github.com/burning-bush-dev">burning-bush-dev</a> (<a href="https://github.com/NicTool/validate/commits?author=burning-bush-dev">1</a>) |
+| <img height="80" src="https://avatars.githubusercontent.com/u/261635?v=4"><br><a href="https://github.com/msimerson">msimerson</a> (<a href="https://github.com/NicTool/validate/commits?author=msimerson">32</a>) | <img height="80" src="https://avatars.githubusercontent.com/u/258583966?v=4"><br><a href="https://github.com/burning-bush-dev">burning-bush-dev</a> (<a href="https://github.com/NicTool/validate/commits?author=burning-bush-dev">1</a>) |
 | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
 
 <sub>this file is generated by [.release](https://github.com/msimerson/.release).
diff --git a/lib/group.js b/lib/group.js
index 0e2e3cd..cf10487 100644
--- a/lib/group.js
+++ b/lib/group.js
@@ -49,7 +49,7 @@ const groupItem = Joi.object({
 })
 
 export const GET_res = Joi.object({
-  group: Joi.alternatives().try(groupItem, Joi.array().items(groupItem)),
+  group: Joi.array().items(groupItem),
   meta: shared.meta,
 })
 
diff --git a/lib/zone.js b/lib/zone.js
index 2873b81..21081ed 100644
--- a/lib/zone.js
+++ b/lib/zone.js
@@ -51,6 +51,7 @@ export const GET_req = Joi.object({
   sort_by: Joi.string().valid('id', 'zone', 'description', 'last_modified'),
   sort_dir: Joi.string().lowercase().valid('asc', 'desc'),
   deleted: Joi.boolean(),
+  include_subgroups: Joi.boolean(),
 }).options({ allowUnknown: true })
 
 export const GET_ns_res = Joi.object({
diff --git a/package.json b/package.json
index b4212c3..74c77ec 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nictool/validate",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "description": "NicTool Object Validation",
   "type": "module",
   "files": [