diff --git a/package.json b/package.json
index 1ddf84a..cb6ac81 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "babel-loader": "^6.2.0",
     "babel-preset-es2015": "^6.3.13",
     "chai": "^3.4.1",
-    "memory-fs": "^0.3.0",
+    "memory-fs": "^0.5.0",
     "mocha": "^2.3.4",
     "webpack": "^1.12.9"
   }