diff --git a/package.json b/package.json
index 2ffe125..5cd7bdd 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "grunt-contrib-copy": "~0.5.0",
     "grunt-contrib-cssmin": "~0.7.0",
     "grunt-contrib-htmlmin": "~0.2.0",
-    "grunt-contrib-imagemin": "~0.5.0",
+    "grunt-contrib-imagemin": "~4.0.0",
     "grunt-contrib-jshint": "~0.8.0",
     "grunt-contrib-uglify": "~0.3.2",
     "grunt-contrib-watch": "~0.5.3",