diff --git a/node_modules/graceful-fs/clone.js b/node_modules/graceful-fs/clone.js
index 028356c96ed5..dff3cc8c504b 100644
--- a/node_modules/graceful-fs/clone.js
+++ b/node_modules/graceful-fs/clone.js
@@ -2,12 +2,16 @@
 
 module.exports = clone
 
+var getPrototypeOf = Object.getPrototypeOf || function (obj) {
+  return obj.__proto__
+}
+
 function clone (obj) {
   if (obj === null || typeof obj !== 'object')
     return obj
 
   if (obj instanceof Object)
-    var copy = { __proto__: obj.__proto__ }
+    var copy = { __proto__: getPrototypeOf(obj) }
   else
     var copy = Object.create(null)
 
diff --git a/node_modules/graceful-fs/graceful-fs.js b/node_modules/graceful-fs/graceful-fs.js
index de3df47fd555..8218b1478a00 100644
--- a/node_modules/graceful-fs/graceful-fs.js
+++ b/node_modules/graceful-fs/graceful-fs.js
@@ -170,6 +170,21 @@ function patch (fs) {
     }
   }
 
+  var fs$copyFile = fs.copyFile
+  if (fs$copyFile)
+    fs.copyFile = copyFile
+  function copyFile (src, dest, cb) {
+    return fs$copyFile(src, dest, function (err) {
+      if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
+        enqueue([fs$copyFile, [src, dest, cb]])
+      else {
+        if (typeof cb === 'function')
+          cb.apply(this, arguments)
+        retry()
+      }
+    })
+  }
+
   var fs$readdir = fs.readdir
   fs.readdir = readdir
   function readdir (path, options, cb) {
diff --git a/node_modules/graceful-fs/package.json b/node_modules/graceful-fs/package.json
index 0a56eb73f375..8eca6d66ff8d 100644
--- a/node_modules/graceful-fs/package.json
+++ b/node_modules/graceful-fs/package.json
@@ -1,7 +1,7 @@
 {
   "name": "graceful-fs",
   "description": "A drop-in replacement for fs, making various improvements.",
-  "version": "4.2.4",
+  "version": "4.2.5",
   "repository": {
     "type": "git",
     "url": "https://github.com/isaacs/node-graceful-fs"
@@ -14,7 +14,8 @@
     "preversion": "npm test",
     "postversion": "npm publish",
     "postpublish": "git push origin --follow-tags",
-    "test": "node test.js | tap -"
+    "test": "nyc --silent node test.js | tap -",
+    "posttest": "nyc report"
   },
   "keywords": [
     "fs",
diff --git a/node_modules/graceful-fs/polyfills.js b/node_modules/graceful-fs/polyfills.js
index a5808d23f132..56d08d180017 100644
--- a/node_modules/graceful-fs/polyfills.js
+++ b/node_modules/graceful-fs/polyfills.js
@@ -19,6 +19,7 @@ process.chdir = function(d) {
   cwd = null
   chdir.call(process, d)
 }
+if (Object.setPrototypeOf) Object.setPrototypeOf(process.chdir, chdir)
 
 module.exports = patch
 
@@ -132,7 +133,7 @@ function patch (fs) {
     }
 
     // This ensures `util.promisify` works as it does for native `fs.read`.
-    read.__proto__ = fs$read
+    if (Object.setPrototypeOf) Object.setPrototypeOf(read, fs$read)
     return read
   })(fs.read)
 
diff --git a/package-lock.json b/package-lock.json
index 4d56291112a1..93c93a51f01f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -374,7 +374,7 @@
         "cli-table3": "^0.6.0",
         "columnify": "~1.5.4",
         "glob": "^7.1.4",
-        "graceful-fs": "^4.2.3",
+        "graceful-fs": "^4.2.5",
         "hosted-git-info": "^3.0.8",
         "ini": "^2.0.0",
         "init-package-json": "^2.0.2",
@@ -3287,9 +3287,9 @@
       }
     },
     "node_modules/graceful-fs": {
-      "version": "4.2.4",
-      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
-      "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw==",
+      "version": "4.2.5",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.5.tgz",
+      "integrity": "sha512-kBBSQbz2K0Nyn+31j/w36fUfxkBW9/gfwRWdUY1ULReH3iokVJgddZAFcD1D0xlgTmFxJCbUkUclAlc6/IDJkw==",
       "inBundle": true
     },
     "node_modules/har-schema": {
@@ -11892,9 +11892,9 @@
       }
     },
     "graceful-fs": {
-      "version": "4.2.4",
-      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
-      "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw=="
+      "version": "4.2.5",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.5.tgz",
+      "integrity": "sha512-kBBSQbz2K0Nyn+31j/w36fUfxkBW9/gfwRWdUY1ULReH3iokVJgddZAFcD1D0xlgTmFxJCbUkUclAlc6/IDJkw=="
     },
     "har-schema": {
       "version": "2.0.0",
diff --git a/package.json b/package.json
index 7db952421f4f..4cc113826236 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "cli-table3": "^0.6.0",
     "columnify": "~1.5.4",
     "glob": "^7.1.4",
-    "graceful-fs": "^4.2.3",
+    "graceful-fs": "^4.2.5",
     "hosted-git-info": "^3.0.8",
     "ini": "^2.0.0",
     "init-package-json": "^2.0.2",