diff --git a/package.json b/package.json
index d0acde05..3c7177d7 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "grunt-nw-builder": "3.1.0",
     "grunt-open": "0.2.3",
     "grunt-replace": "1.0.1",
-    "grunt-spritesmith": "6.3.0",
+    "grunt-spritesmith": "6.4.0",
     "jasmine-core": "2.6.1",
     "karma": "1.7.0",
     "karma-jasmine": "1.1.0",