diff --git a/package.json b/package.json
index 7099a5e..961b5de 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "events": "1.1.0",
     "lodash": "4.17.4",
     "mocha": "3.4.1",
-    "mock-fs": "3.12.1",
+    "mock-fs": "4.4.0",
     "sinon": "1.17.7"
   }
 }