diff --git a/package.json b/package.json
index 0e52c0f..6bd9248 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "optimist": "^0.6.1",
     "optipng": "^2.0.0",
     "passerror": "^1.1.1",
-    "pngcrush": "^2.0.1",
+    "pngcrush": "2.1.0",
     "pngquant": "^3.0.0",
     "sharp": "^0.23.0"
   },