diff --git a/package.json b/package.json
index aa7838b0..52c8aedd 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "grumbler-scripts": "^3",
     "imagemagick": "^0.1.3",
     "imgur": "^0.2.1",
-    "memory-fs": "^0.4.1",
+    "memory-fs": "^0.5.0",
     "mocha": "^4",
     "mocketeer": "^0.3.0",
     "pixelmatch": "^4.0.2",