diff --git a/__tests__/cmds/openapi/index.test.ts b/__tests__/cmds/openapi/index.test.ts
index 827d0d442..854e59f4c 100644
--- a/__tests__/cmds/openapi/index.test.ts
+++ b/__tests__/cmds/openapi/index.test.ts
@@ -11,7 +11,7 @@ import { describe, beforeAll, beforeEach, afterEach, it, expect, vi } from 'vite
 import OpenAPICommand from '../../../src/cmds/openapi/index.js';
 import APIError from '../../../src/lib/apiError.js';
 import config from '../../../src/lib/config.js';
-import petstoreWeird from '../../__fixtures__/petstore-simple-weird-version.json' assert { type: 'json' };
+import petstoreWeird from '../../__fixtures__/petstore-simple-weird-version.json' with { type: 'json' };
 import getAPIMock, { getAPIMockWithVersionHeader } from '../../helpers/get-api-mock.js';
 import { after, before } from '../../helpers/get-gha-setup.js';
 import { after as afterGHAEnv, before as beforeGHAEnv } from '../../helpers/setup-gha-env.js';
diff --git a/__tests__/index.test.ts b/__tests__/index.test.ts
index 6bdb88472..5dea2b022 100644
--- a/__tests__/index.test.ts
+++ b/__tests__/index.test.ts
@@ -1,7 +1,7 @@
 import prompts from 'prompts';
 import { describe, beforeEach, afterEach, it, expect, vi } from 'vitest';
 
-import pkg from '../package.json' assert { type: 'json' };
+import pkg from '../package.json' with { type: 'json' };
 import cli from '../src/index.js';
 import conf from '../src/lib/configstore.js';
 
diff --git a/__tests__/lib/analyzeOas.test.ts b/__tests__/lib/analyzeOas.test.ts
index 408cffe91..61ebe82fd 100644
--- a/__tests__/lib/analyzeOas.test.ts
+++ b/__tests__/lib/analyzeOas.test.ts
@@ -1,6 +1,6 @@
 import type { OASDocument } from 'oas/types';
 
-import petstore from '@readme/oas-examples/3.0/json/petstore.json' assert { type: 'json' };
+import petstore from '@readme/oas-examples/3.0/json/petstore.json' with { type: 'json' };
 import { describe, it, expect } from 'vitest';
 
 import analyzeOas, { getSupportedFeatures } from '../../src/lib/analyzeOas.js';
diff --git a/__tests__/lib/fetch.test.ts b/__tests__/lib/fetch.test.ts
index 6fb870124..3c56a54d8 100644
--- a/__tests__/lib/fetch.test.ts
+++ b/__tests__/lib/fetch.test.ts
@@ -2,7 +2,7 @@
 import { Headers } from 'node-fetch';
 import { describe, beforeEach, afterEach, it, expect, vi } from 'vitest';
 
-import pkg from '../../package.json' assert { type: 'json' };
+import pkg from '../../package.json' with { type: 'json' };
 import readmeAPIFetch, { cleanHeaders, handleRes } from '../../src/lib/readmeAPIFetch.js';
 import getAPIMock from '../helpers/get-api-mock.js';
 import { after, before } from '../helpers/setup-gha-env.js';
diff --git a/__tests__/lib/getPkgVersion.test.ts b/__tests__/lib/getPkgVersion.test.ts
index ded06dd79..a57a3025a 100644
--- a/__tests__/lib/getPkgVersion.test.ts
+++ b/__tests__/lib/getPkgVersion.test.ts
@@ -2,7 +2,7 @@ import nock from 'nock';
 import semver from 'semver';
 import { describe, beforeEach, afterEach, it, expect, vi } from 'vitest';
 
-import pkg from '../../package.json' assert { type: 'json' };
+import pkg from '../../package.json' with { type: 'json' };
 import { getNodeVersion, getPkgVersion } from '../../src/lib/getPkgVersion.js';
 
 describe('#getNodeVersion()', () => {
diff --git a/__tests__/single-threaded/lib/createGHA.test.ts b/__tests__/single-threaded/lib/createGHA.test.ts
index f51e19983..0f87c7b5d 100644
--- a/__tests__/single-threaded/lib/createGHA.test.ts
+++ b/__tests__/single-threaded/lib/createGHA.test.ts
@@ -19,7 +19,7 @@ import createGHA, { getConfigStoreKey, getGHAFileName, getGitData, git } from '.
 import { getMajorPkgVersion } from '../../../src/lib/getPkgVersion.js';
 import { after, before } from '../../helpers/get-gha-setup.js';
 import getGitRemoteMock from '../../helpers/get-git-mock.js';
-import ghaWorkflowSchema from '../../helpers/github-workflow-schema.json' assert { type: 'json' };
+import ghaWorkflowSchema from '../../helpers/github-workflow-schema.json' with { type: 'json' };
 
 const testWorkingDir = process.cwd();
 
diff --git a/bin/set-action-image.js b/bin/set-action-image.js
index b0410610f..60d89be85 100755
--- a/bin/set-action-image.js
+++ b/bin/set-action-image.js
@@ -5,7 +5,7 @@ import fs from 'node:fs/promises';
 // eslint-disable-next-line import/no-extraneous-dependencies
 import jsYaml from 'js-yaml';
 
-import pkg from '../package.json' assert { type: 'json' };
+import pkg from '../package.json' with { type: 'json' };
 
 /**
  * Updates our `action.yml` file so it properly points to
diff --git a/bin/set-major-version-tag.js b/bin/set-major-version-tag.js
index 97b351f68..e60997f0e 100755
--- a/bin/set-major-version-tag.js
+++ b/bin/set-major-version-tag.js
@@ -5,7 +5,7 @@ import util from 'node:util';
 
 import { parse } from 'semver';
 
-import pkg from '../package.json' assert { type: 'json' };
+import pkg from '../package.json' with { type: 'json' };
 
 const execFile = util.promisify(unpromisifiedExecFile);
 
diff --git a/package.json b/package.json
index aaa067ece..6b486cde9 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "license": "MIT",
   "author": "ReadMe <support@readme.io> (https://readme.com)",
   "engines": {
-    "node": ">=18"
+    "node": "^18.20.0 || >=20.10.0"
   },
   "bin": {
     "rdme": "bin/rdme.js"
diff --git a/src/cli.ts b/src/cli.ts
index 3380a0733..17c8b4d6b 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -3,7 +3,7 @@ import * as core from '@actions/core';
 import chalk from 'chalk';
 import updateNotifier from 'update-notifier';
 
-import pkg from '../package.json' assert { type: 'json' };
+import pkg from '../package.json' with { type: 'json' };
 
 import { isGHA } from './lib/isCI.js';
 
diff --git a/src/index.ts b/src/index.ts
index 45f3b1951..99c0647af 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -7,7 +7,7 @@ import chalk from 'chalk';
 import cliArgs from 'command-line-args';
 import parseArgsStringToArgv from 'string-argv';
 
-import pkg from '../package.json' assert { type: 'json' };
+import pkg from '../package.json' with { type: 'json' };
 
 import * as commands from './lib/commands.js';
 import config from './lib/config.js';
diff --git a/src/lib/config.ts b/src/lib/config.ts
index bf8d11d1b..f28a59b80 100644
--- a/src/lib/config.ts
+++ b/src/lib/config.ts
@@ -1,4 +1,4 @@
-import pkg from '../../package.json' assert { type: 'json' };
+import pkg from '../../package.json' with { type: 'json' };
 
 const config = {
   cli: pkg.name,
diff --git a/src/lib/configstore.ts b/src/lib/configstore.ts
index c5508b444..05d4250a9 100644
--- a/src/lib/configstore.ts
+++ b/src/lib/configstore.ts
@@ -1,6 +1,6 @@
 import Configstore from 'configstore';
 
-import pkg from '../../package.json' assert { type: 'json' };
+import pkg from '../../package.json' with { type: 'json' };
 
 const configstore = new Configstore(
   /**
diff --git a/src/lib/getPkgVersion.ts b/src/lib/getPkgVersion.ts
index 91728fb4c..9a05333af 100644
--- a/src/lib/getPkgVersion.ts
+++ b/src/lib/getPkgVersion.ts
@@ -2,7 +2,7 @@
 import fetch from 'node-fetch';
 import semver from 'semver';
 
-import pkg from '../../package.json' assert { type: 'json' };
+import pkg from '../../package.json' with { type: 'json' };
 
 import { error } from './logger.js';
 
@@ -18,13 +18,13 @@ type npmDistTag = 'latest';
  *
  * @example 14
  */
-export function getNodeVersion() {
+export function getNodeVersion(): string {
   const { node } = pkg.engines;
   const parsedVersion = semver.minVersion(node);
   if (!parsedVersion) {
     throw new Error('`version` value in package.json is invalid');
   }
-  return parsedVersion.major;
+  return parsedVersion.version;
 }
 
 /**
diff --git a/src/lib/readmeAPIFetch.ts b/src/lib/readmeAPIFetch.ts
index 153b2d5f2..25823bc96 100644
--- a/src/lib/readmeAPIFetch.ts
+++ b/src/lib/readmeAPIFetch.ts
@@ -6,7 +6,7 @@ import path from 'node:path';
 import mime from 'mime-types';
 import nodeFetch, { Headers } from 'node-fetch'; // eslint-disable-line no-restricted-imports
 
-import pkg from '../../package.json' assert { type: 'json' };
+import pkg from '../../package.json' with { type: 'json' };
 
 import APIError from './apiError.js';
 import config from './config.js';