diff --git a/package.json b/package.json
index 56802dbb..2f49d9eb 100644
--- a/package.json
+++ b/package.json
@@ -36,10 +36,8 @@
     "grunt-browserify": "^5.0.0",
     "grunt-contrib-concat": "^0.5.0",
     "grunt-contrib-watch": "^0.6.1",
-    "image-diff": "^1.6.3",
     "image-filter-core": "~1.0.0",
     "image-filter-threshold": "~1.0.0",
-    "imagemagick": "^0.1.3",
     "looks-same": "^3.2.1",
     "matchdep": "^0.3.0",
     "plotly.js": "~1.21.2",