diff --git a/.eslintrc.js b/.eslintrc.js
deleted file mode 100644
index 7b40364..0000000
--- a/.eslintrc.js
+++ /dev/null
@@ -1,36 +0,0 @@
-module.exports = {
-  "env": {
-    "browser": true,
-    "es6": true,
-    "node": true
-  },
-  "extends": "eslint:recommended", 
-  "parserOptions": {
-    "ecmaVersion": 5
-  },
-  "rules": {
-    "no-console" : "off",
-    "no-empty" : ["warn", { "allowEmptyCatch": true }]
-  },
-  "overrides": [
-    {
-      "files": ["test/*"],
-      "parserOptions": {
-        "ecmaVersion": 2017
-      },
-      "globals": {
-        "describe": "readonly",
-        "it": "readonly"
-      }
-    },
-    {
-      "files": ["javascript/*"],
-      "globals": {
-        "define": "readonly"
-      },
-      "rules": {
-        "no-prototype-builtins" : "off"
-      }
-    }
-  ]
-};
\ No newline at end of file
diff --git a/.npmignore b/.npmignore
index a387b57..3841d55 100644
--- a/.npmignore
+++ b/.npmignore
@@ -5,6 +5,7 @@ web-midi-api
 test*
 coverage
 Gruntfile.js
+eslint.config.mjs
 *.html
 *.bat
 !test
diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 0000000..f37f309
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,38 @@
+import globals from "globals";
+import js from "@eslint/js";
+
+export default [
+    js.configs.recommended,
+    {
+        ignores: ["**/.instrumented/*"]
+    },
+    {
+        files: ["javascript/*.js", "test/*.js"],
+        languageOptions: {
+            ecmaVersion: 2015,
+            globals: {
+                ...globals.browser,
+                ...globals.node,
+                define: "readonly",
+                JZZ: "readonly"
+            }
+        },
+        rules: {
+            "no-empty" : ["error", { "allowEmptyCatch": true }],
+            "no-prototype-builtins": "off",
+            "no-unused-vars": ["error", { caughtErrors: "none"}]
+        }
+    },
+    {
+        files: ["test/*.js"],
+        languageOptions: {
+            ecmaVersion: 2017,
+            globals: {
+                describe: "readonly",
+                it: "readonly",
+                before: "readonly",
+                after: "readonly"
+            }
+        }
+    }
+];
\ No newline at end of file
diff --git a/package.json b/package.json
index 800a15e..9f27f98 100644
--- a/package.json
+++ b/package.json
@@ -18,17 +18,17 @@
   ],
   "author": "jazz-soft (https://jazz-soft.net/)",
   "dependencies": {
-    "@types/webmidi": "^2.0.10",
+    "@types/webmidi": "^2.1.0",
     "jazz-midi": "^1.7.9"
   },
   "devDependencies": {
-    "eslint": "^9.2.0",
+    "eslint": "^9.5.0",
     "grunt": "^1.6.1",
     "grunt-contrib-jshint": "^3.2.0",
     "grunt-contrib-uglify": "^5.2.2",
     "midi-test": "^1.3.1",
     "mocha": "^10.4.0",
-    "nyc": "^15.1.0",
+    "nyc": "^17.0.0",
     "web-audio-test": "^0.0.8",
     "web-midi-test": "^1.2.8"
   },