diff --git a/README.md b/README.md
index 012e77a..b5921b6 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 # scratch-audio
 #### Scratch audio engine is for playing sounds, instruments and audio effects in Scratch 3.0 projects
 
+[![Greenkeeper badge](https://badges.greenkeeper.io/LLK/scratch-audio.svg)](https://greenkeeper.io/)
+
 #### Please note this project is at an early stage and we are not ready for pull requests
 
 [![Build Status](https://travis-ci.org/LLK/scratch-audio.svg?branch=develop)](https://travis-ci.org/LLK/scratch-audio)
diff --git a/package.json b/package.json
index 9f44834..2f90211 100644
--- a/package.json
+++ b/package.json
@@ -21,17 +21,16 @@
   },
   "homepage": "https://github.com/LLK/scratch-audio#readme",
   "devDependencies": {
-    "babel-core": "6.17.0",
-    "babel-eslint": "7.0.0",
-    "babel-loader": "6.2.5",
-    "babel-preset-es2015": "6.16.0",
-    "eslint": "3.7.1",
-    "json": "9.0.4",
+    "babel-core": "^6.24.1",
+    "babel-eslint": "^7.2.2",
+    "babel-loader": "^6.4.1",
+    "babel-preset-es2015": "^6.24.1",
+    "eslint": "^3.19.0",
+    "json": "^9.0.6",
     "minilog": "^3.0.1",
     "soundfont-player": "0.10.5",
     "tone": "0.9.0",
-    "travis-after-all": "1.4.4",
-    "webpack": "1.13.2"
-  },
-  "dependencies": {}
+    "travis-after-all": "^1.4.4",
+    "webpack": "2.4.0"
+  }
 }
diff --git a/src/InstrumentPlayer.js b/src/InstrumentPlayer.js
index 718fad5..9a989bc 100644
--- a/src/InstrumentPlayer.js
+++ b/src/InstrumentPlayer.js
@@ -19,9 +19,9 @@ function InstrumentPlayer (outputNode) {
     // match scratch instruments
     this.instrumentNames = ['acoustic_grand_piano', 'electric_piano_1',
         'drawbar_organ', 'acoustic_guitar_nylon', 'electric_guitar_clean',
-         'acoustic_bass', 'pizzicato_strings', 'cello', 'trombone', 'clarinet',
-         'tenor_sax', 'flute', 'pan_flute', 'bassoon', 'choir_aahs', 'vibraphone',
-         'music_box', 'steel_drums', 'marimba', 'lead_1_square', 'fx_4_atmosphere'];
+        'acoustic_bass', 'pizzicato_strings', 'cello', 'trombone', 'clarinet',
+        'tenor_sax', 'flute', 'pan_flute', 'bassoon', 'choir_aahs', 'vibraphone',
+        'music_box', 'steel_drums', 'marimba', 'lead_1_square', 'fx_4_atmosphere'];
 
     this.instruments = [];
 }