diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index ff202757..09242e06 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "5.8.0"
+  ".": "5.9.0"
 }
diff --git a/.stats.yml b/.stats.yml
index 43e82626..5076b7f7 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 118
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-2c9291de1fd876908ebe56144e90762ab6e390e3f25102da815ab3fca6335d38.yml
-openapi_spec_hash: eabe2d8e58ceed1d61d41fe7a44020ca
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-d661add554c414c758c2ab668ddfe60da8b4c5cd81c44e59ccca1c2c5c91e898.yml
+openapi_spec_hash: 3765a1f72610d1018727f51138dfffc3
 config_hash: 1f73a949b649ecfe6ec68ba1bb459dc2
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fd139f61..a8b825d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 5.9.0 (2025-09-12)
+
+Full Changelog: [v5.8.0...v5.9.0](https://github.com/orbcorp/orb-node/compare/v5.8.0...v5.9.0)
+
+### Features
+
+* **api:** api update ([dd56e04](https://github.com/orbcorp/orb-node/commit/dd56e04b1915c3bf2cbdffaa22316ce8fb9b37d6))
+
 ## 5.8.0 (2025-09-10)
 
 Full Changelog: [v5.7.0...v5.8.0](https://github.com/orbcorp/orb-node/compare/v5.7.0...v5.8.0)
diff --git a/package.json b/package.json
index f7569e9b..bbf19206 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "orb-billing",
-  "version": "5.8.0",
+  "version": "5.9.0",
   "description": "The official TypeScript library for the Orb API",
   "author": "Orb <team@withorb.com>",
   "types": "dist/index.d.ts",
diff --git a/src/resources/items.ts b/src/resources/items.ts
index 06a4eec7..295b8f69 100644
--- a/src/resources/items.ts
+++ b/src/resources/items.ts
@@ -85,7 +85,8 @@ export namespace Item {
       | 'netsuite'
       | 'taxjar'
       | 'avalara'
-      | 'anrok';
+      | 'anrok'
+      | 'numeral';
 
     external_entity_id: string;
   }
@@ -127,7 +128,8 @@ export namespace ItemUpdateParams {
       | 'netsuite'
       | 'taxjar'
       | 'avalara'
-      | 'anrok';
+      | 'anrok'
+      | 'numeral';
 
     external_entity_id: string;
   }
diff --git a/src/version.ts b/src/version.ts
index acc2084a..33ac8176 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '5.8.0'; // x-release-please-version
+export const VERSION = '5.9.0'; // x-release-please-version