diff --git a/.eslintrc.js b/.eslintrc.js
deleted file mode 100644
index f8973fd..0000000
--- a/.eslintrc.js
+++ /dev/null
@@ -1,32 +0,0 @@
-module.exports = {
-  "env": {
-    "browser": true,
-    "es6": true,
-    "node": true
-  },
-  "extends": "eslint:recommended", 
-  "parserOptions": {
-    "ecmaVersion": 5
-  },
-  "overrides": [
-    {
-      "files": ["test/*"],
-      "globals": {
-        "describe": "readonly",
-        "it": "readonly"
-      }
-    },
-    {
-      "files": ["javascript/*"],
-      "globals": {
-        "define": "readonly",
-        "JZZ": "readonly"
-      },
-      "rules": {
-        "no-console" : "off",
-        "no-empty" : ["warn", { "allowEmptyCatch": true }],
-        "no-prototype-builtins" : "off"
-      }
-    }
-  ]
-};
\ No newline at end of file
diff --git a/.npmignore b/.npmignore
index 23a9b30..1ffa32d 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,8 +1,8 @@
 .*
 minified
-test
+test*
 data
 coverage
 Gruntfile.js
-test*
+eslint.config.mjs
 !test
diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 0000000..c26011d
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,36 @@
+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-prototype-builtins": "off",
+            "no-unused-vars": ["error", { caughtErrors: "none"}]
+        }
+    },
+    {
+        files: ["test/*.js"],
+        languageOptions: {
+            globals: {
+                describe: "readonly",
+                it: "readonly",
+                before: "readonly",
+                after: "readonly"
+            }
+        }
+    }
+];
\ No newline at end of file
diff --git a/package.json b/package.json
index e0b4a0e..aaa2854 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jzz-midi-gm",
-  "version": "1.3.7",
+  "version": "1.3.8",
   "description": "General MIDI / GM2 / GS / XG instrument names",
   "main": "javascript/JZZ.midi.GM.js",
   "scripts": {
@@ -18,15 +18,15 @@
   ],
   "author": "jazz-soft (https://jazz-soft.net/)",
   "dependencies": {
-    "jzz": "^1.8.4"
+    "jzz": "^1.8.5"
   },
   "devDependencies": {
-    "eslint": "^9.3.0",
+    "eslint": "^9.5.0",
     "grunt": "^1.6.1",
     "grunt-contrib-jshint": "^3.2.0",
     "grunt-contrib-uglify": "^5.2.2",
     "mocha": "^10.4.0",
-    "nyc": "^15.1.0"
+    "nyc": "^17.0.0"
   },
   "repository": {
     "type": "git",