diff --git a/package.json b/package.json
index 0389346..a32cbc9 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "util-extend": "^1.0.1"
   },
   "optionalDependencies": {
-    "graceful-fs": "2 || 3"
+    "graceful-fs": "^4.1.2"
   },
   "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
   "license": "ISC",