diff --git a/index.js b/index.js
index 214929b..137a38f 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,5 @@
-import { createPublish } from './lib/publish';
-import { git } from './lib/git';
+import { createPublish } from './lib/publish.js';
+import { git } from './lib/git.js';
 
 const publishTags = createPublish(git);
 async function publish(pluginConfig, context) { 
diff --git a/lib/git.js b/lib/git.js
index 3a0c8e3..67a215d 100644
--- a/lib/git.js
+++ b/lib/git.js
@@ -1,6 +1,6 @@
 import { promisify } from 'util';
 import { exec as pureExec } from 'child_process';
-import { GitError } from './errors/GitError';
+import { GitError } from './errors/GitError.js';
 
 const exec = promisify(pureExec);
 
diff --git a/lib/publish.js b/lib/publish.js
index b7c5196..5802030 100644
--- a/lib/publish.js
+++ b/lib/publish.js
@@ -1,4 +1,4 @@
-import { resolveTags } from './resolveTags';
+import { resolveTags } from './resolveTags.js';
 
 function createPublish(git) {
   return async (pluginConfig, context) => {
diff --git a/lib/publish.test.js b/lib/publish.test.js
index 67ff09e..6d0c8dc 100644
--- a/lib/publish.test.js
+++ b/lib/publish.test.js
@@ -1,5 +1,5 @@
 import { describe, it, expect, vi } from 'vitest';
-import { createPublish }  from './publish';
+import { createPublish }  from './publish.js';
 
 describe('publish()', () => {
   const createMockedPublish = () => {
diff --git a/lib/resolveTags.test.js b/lib/resolveTags.test.js
index 7be7b66..85bd29b 100644
--- a/lib/resolveTags.test.js
+++ b/lib/resolveTags.test.js
@@ -1,5 +1,5 @@
 import { describe, it, expect } from 'vitest';
-import { resolveTags } from './resolveTags';
+import { resolveTags } from './resolveTags.js';
 
 describe('resolveTags()', () => {
   it('given tag v1.0.0, returns array with v1 and v1.0', () => {