diff --git a/package.json b/package.json
index 91e7168..fd2337f 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "@tsclass/tsclass": "^9.3.0",
-    "feed": "^4.2.1",
+    "feed": "^5.1.0",
     "rss-parser": "^3.10.0"
   },
   "browserslist": [
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2b9be8d..c1f90e4 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -12,8 +12,8 @@ importers:
         specifier: ^9.3.0
         version: 9.3.0
       feed:
-        specifier: ^4.2.1
-        version: 4.2.2
+        specifier: ^5.1.0
+        version: 5.1.0
       rss-parser:
         specifier: ^3.10.0
         version: 3.13.0
@@ -2080,6 +2080,10 @@ packages:
     resolution: {integrity: sha512-u5/sxGfiMfZNtJ3OvQpXcvotFpYkL0n9u9mM2vkui2nGo8b4wvDkJ8gAkYqbA8QpGyFCv3RK0Z+Iv+9veCS9bQ==}
     engines: {node: '>=0.4.0'}
 
+  feed@5.1.0:
+    resolution: {integrity: sha512-qGNhgYygnefSkAHHrNHqC7p3R8J0/xQDS/cYUud8er/qD9EFGWyCdUDfULHTJQN1d3H3WprzVwMc9MfB4J50Wg==}
+    engines: {node: '>=20', pnpm: '>=10'}
+
   fflate@0.8.2:
     resolution: {integrity: sha512-cPJU47OaAoCbg0pBvzsgpTPhmhqI5eJjh/JIu8tPj5q+T7iLvW/JAYUqmE7KOB4R1ZyEhzBaIQpQpardBF5z8A==}
 
@@ -6885,6 +6889,10 @@ snapshots:
     dependencies:
       xml-js: 1.6.11
 
+  feed@5.1.0:
+    dependencies:
+      xml-js: 1.6.11
+
   fflate@0.8.2: {}
 
   figures@6.1.0:
diff --git a/test/test.ts b/test/test.ts
index cfccf6f..659fc34 100644
--- a/test/test.ts
+++ b/test/test.ts
@@ -1,11 +1,11 @@
 import { expect, tap } from '@git.zone/tstest/tapbundle';
-import * as smartfeed from '../ts/index';
+import * as smartfeed from '../ts/index.js';
 
 let testSmartFeed: smartfeed.Smartfeed;
 
 tap.test('should create a feedVersion', async () => {
   testSmartFeed = new smartfeed.Smartfeed();
-  expect(testSmartFeed).to.be.instanceOf(smartfeed.Smartfeed);
+  expect(testSmartFeed).toBeInstanceOf(smartfeed.Smartfeed);
 });
 
 tap.test('should create a feed', async () => {
diff --git a/ts/index.ts b/ts/index.ts
index bbc959f..73607b3 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -1,2 +1,2 @@
-export * from './smartfeed.classes.smartfeed';
-export * from './smartfeed.classes.feed';
+export * from './smartfeed.classes.smartfeed.js';
+export * from './smartfeed.classes.feed.js';
diff --git a/ts/smartfeed.classes.feed.ts b/ts/smartfeed.classes.feed.ts
index 6469664..f780778 100644
--- a/ts/smartfeed.classes.feed.ts
+++ b/ts/smartfeed.classes.feed.ts
@@ -1,4 +1,4 @@
-import * as plugins from './smartfeed.plugins';
+import * as plugins from './smartfeed.plugins.js';
 
 export interface IFeedOptions {
   domain: string;
diff --git a/ts/smartfeed.classes.smartfeed.ts b/ts/smartfeed.classes.smartfeed.ts
index 825e2a8..1e97f56 100644
--- a/ts/smartfeed.classes.smartfeed.ts
+++ b/ts/smartfeed.classes.smartfeed.ts
@@ -1,5 +1,6 @@
-import { Feed, IFeedOptions } from './smartfeed.classes.feed';
-import * as plugins from './smartfeed.plugins';
+import { Feed } from './smartfeed.classes.feed.js';
+import type { IFeedOptions } from './smartfeed.classes.feed.js';
+import * as plugins from './smartfeed.plugins.js';
 
 export class Smartfeed {
   public createFeed(optionsArg: IFeedOptions) {