diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0cc9eb..d039064 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [4.14.3] 2026-04-13
+## [4.15.0] 2026-04-13
+### Added
+- Add `organizations.updateDefaultSeries` to set an organization default series by type.
+
 ### Fixed
 - Return blob if content-type is octet-stream. This is the coverage for zip files 
 
diff --git a/package-lock.json b/package-lock.json
index 2f65861..e4b40da 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "facturapi",
-  "version": "4.14.2",
+  "version": "4.15.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "facturapi",
-      "version": "4.14.2",
+      "version": "4.15.0",
       "license": "MIT",
       "devDependencies": {
         "@eslint/js": "^10.0.1",
diff --git a/package.json b/package.json
index eaea0d4..f2190c5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "facturapi",
-  "version": "4.14.2",
+  "version": "4.15.0",
   "description": "SDK oficial de Facturapi para Node.js y navegadores. Integra facturación electrónica en México (CFDI) de forma simple y obtén una perspectiva fiscal completa de tu operación, con búsquedas indexadas, envío de documentos y trazabilidad.",
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
@@ -95,4 +95,4 @@
     "vite": "^8.0.3",
     "vitest": "^4.1.2"
   }
-}
\ No newline at end of file
+}
diff --git a/src/resources/organizations.ts b/src/resources/organizations.ts
index 264fde2..56bb6c7 100644
--- a/src/resources/organizations.ts
+++ b/src/resources/organizations.ts
@@ -10,6 +10,7 @@ import type {
   OrganizationTeamRoleTemplate,
   OrganizationTeamRoleUpdateInput,
   OrganizationUserAccess,
+  OrganizationDefaultSeriesUpdateInput,
   Series,
 } from '../types/organization';
 import type { BinaryInput, NodeLikeReadableStream } from '../types';
@@ -347,6 +348,24 @@ export default class Organizations {
     );
   }
 
+  /**
+   * Sets default series for an organization
+   * @param organization_id Organization Id
+   * @param data Default series input
+   * @returns Organization object
+   */
+  updateDefaultSeries(
+    organization_id: string,
+    data: OrganizationDefaultSeriesUpdateInput,
+  ): Promise<Organization> {
+    return this.client.put(
+      `/organizations/${organization_id}/series-group/default-series`,
+      {
+        body: data,
+      },
+    );
+  }
+
   /**
    * Update a Series Organization
    * @param organization_id Organization Id
diff --git a/src/types/organization.ts b/src/types/organization.ts
index cbf3a6d..fd90841 100644
--- a/src/types/organization.ts
+++ b/src/types/organization.ts
@@ -7,6 +7,11 @@ export interface Series {
   next_folio_test: number;
 }
 
+export interface OrganizationDefaultSeriesUpdateInput {
+  type: 'I' | 'E' | 'P' | 'N' | 'T';
+  series: string;
+}
+
 export interface ApiKeys {
   id: string;
   first_12: string;