diff --git a/package.json b/package.json
index ed8ee28..d1bf33e 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "@speedy/commit-msg-hook": "^1.3.0",
     "@types/jasmine": "^2.5.41",
     "@types/lodash": "^4.14.51",
-    "@types/mock-fs": "^3.6.30",
+    "@types/mock-fs": "^4.0.0",
     "@types/node": "^10.0.0",
     "conventional-changelog-cli": "^2.0.0",
     "jasmine": "^3.0.0",