diff --git a/eslint.config.js b/eslint.config.js
index bd4cd6bc..767d028b 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -23,11 +23,7 @@ export default [
         files: ["tools/**"],
         rules: {
             "no-console": "off",
-            "n/no-process-exit": "off",
-            "n/no-unsupported-features/es-syntax": ["error", {
-                version: ">=16.0.0",
-                ignores: ["modules"]
-            }]
+            "n/no-process-exit": "off"
         }
     }
 ];
diff --git a/espree.js b/espree.js
index e9b11188..15e0ce52 100644
--- a/espree.js
+++ b/espree.js
@@ -1,5 +1,3 @@
-/* eslint-disable jsdoc/no-multi-asterisks -- needed to preserve original formatting of licences */
-
 /**
  * @fileoverview Main Espree file that converts Acorn into Esprima output.
  *
@@ -57,7 +55,6 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-/* eslint-enable jsdoc/no-multi-asterisks -- needed to preserve original formatting of licences */
 
 import * as acorn from "acorn";
 import jsx from "acorn-jsx";
@@ -160,7 +157,7 @@ export const Syntax = (function() {
     }
 
     for (key in VisitorKeys) {
-        if (Object.hasOwnProperty.call(VisitorKeys, key)) {
+        if (Object.hasOwn(VisitorKeys, key)) {
             types[key] = key;
         }
     }
diff --git a/lib/options.js b/lib/options.js
index 1460ac27..8eae1b0c 100644
--- a/lib/options.js
+++ b/lib/options.js
@@ -27,7 +27,7 @@ const SUPPORTED_VERSIONS = [
  * @returns {number} The latest ECMAScript version.
  */
 export function getLatestEcmaVersion() {
-    return SUPPORTED_VERSIONS[SUPPORTED_VERSIONS.length - 1];
+    return SUPPORTED_VERSIONS.at(-1);
 }
 
 /**
diff --git a/lib/token-translator.js b/lib/token-translator.js
index 2a915fb5..6daf865a 100644
--- a/lib/token-translator.js
+++ b/lib/token-translator.js
@@ -40,7 +40,7 @@ const Token = {
  */
 function convertTemplatePart(tokens, code) {
     const firstToken = tokens[0],
-        lastTemplateToken = tokens[tokens.length - 1];
+        lastTemplateToken = tokens.at(-1);
 
     const token = {
         type: Token.Template,
diff --git a/package.json b/package.json
index 8b4ef8e8..c8991cbb 100644
--- a/package.json
+++ b/package.json
@@ -42,11 +42,11 @@
     "@rollup/plugin-node-resolve": "^11.2.0",
     "c8": "^7.11.0",
     "chai": "^4.3.6",
-    "eslint": "^8.44.0",
-    "eslint-config-eslint": "^9.0.0",
+    "eslint": "^9.1.1",
+    "eslint-config-eslint": "^10.0.0",
     "eslint-release": "^3.2.0",
     "esprima-fb": "^8001.2001.0-dev-harmony-fb",
-    "globals": "^13.20.0",
+    "globals": "^15.1.0",
     "lint-staged": "^13.2.0",
     "mocha": "^9.2.2",
     "npm-run-all": "^4.1.5",
@@ -70,7 +70,7 @@
     "build:debug": "npm run build -- -m",
     "build:docs": "node tools/sync-docs.js",
     "build:update-version": "node tools/update-version.js",
-    "lint": "eslint .  --report-unused-disable-directives",
+    "lint": "eslint .",
     "lint:fix": "npm run lint -- --fix",
     "prepublishOnly": "npm run build:update-version && npm run build",
     "pretest": "npm run build",
diff --git a/tools/create-test.js b/tools/create-test.js
index 20c731c0..1179ad8c 100644
--- a/tools/create-test.js
+++ b/tools/create-test.js
@@ -89,7 +89,7 @@ code.forEach((source, index) => {
         sourceCode = source.trim();
 
     // add an extra semicolon if there's not already one at the end - helps normalize empty lines at end of input
-    if (sourceCode[sourceCode.length - 1] !== ";") {
+    if (sourceCode.at(-1) !== ";") {
         sourceCode += ";";
     }
 
diff --git a/tools/update-tests.js b/tools/update-tests.js
index 16aef31b..e2792c74 100644
--- a/tools/update-tests.js
+++ b/tools/update-tests.js
@@ -70,14 +70,13 @@ const testFiles = getTestFilenames(FIXTURES_DIR),
 libraryFiles.forEach(filename => {
     const testResultFilename = `${path.resolve(__dirname, "..", LIBRARIES_DIR, filename)}.result.json`,
         code = shelljs.cat(path.resolve(LIBRARIES_DIR, filename));
-    let result = tester.getExpectedResult(code, {
+    const result = tester.getExpectedResult(code, {
         loc: true,
         range: true,
         tokens: true
     });
 
     JSON.stringify(result).to(testResultFilename);
-    result = null;
 });
 
 // update all tests in ecma-features