diff --git a/atom/browser/api/atom_api_top_level_window.cc b/atom/browser/api/atom_api_top_level_window.cc
index a334dd9a143d..8e9b5f90d5c6 100644
--- a/atom/browser/api/atom_api_top_level_window.cc
+++ b/atom/browser/api/atom_api_top_level_window.cc
@@ -667,8 +667,8 @@ v8::Local<v8::Value> TopLevelWindow::GetNativeWindowHandle() {
   // TODO(MarshallOfSound): Replace once
   // https://chromium-review.googlesource.com/c/chromium/src/+/1253094/ has
   // landed
-  auto handle = window_->GetNativeWindowHandlePointer();
-  return ToBuffer(isolate(), std::get<0>(handle), std::get<1>(handle));
+  NativeWindowHandle handle = window_->GetNativeWindowHandle();
+  return ToBuffer(isolate(), &handle, sizeof(handle));
 }
 
 void TopLevelWindow::SetProgressBar(double progress, mate::Arguments* args) {
diff --git a/atom/browser/native_window.h b/atom/browser/native_window.h
index 23ec5e0c4281..7845a9ae1610 100644
--- a/atom/browser/native_window.h
+++ b/atom/browser/native_window.h
@@ -45,6 +45,12 @@ class NativeBrowserView;
 
 struct DraggableRegion;
 
+#if defined(OS_MACOSX)
+typedef NSView* NativeWindowHandle;
+#else
+typedef gfx::AcceleratedWidget NativeWindowHandle;
+#endif
+
 class NativeWindow : public base::SupportsUserData,
                      public views::WidgetDelegate {
  public:
@@ -151,7 +157,7 @@ class NativeWindow : public base::SupportsUserData,
   virtual gfx::NativeView GetNativeView() const = 0;
   virtual gfx::NativeWindow GetNativeWindow() const = 0;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() const = 0;
-  virtual std::tuple<void*, int> GetNativeWindowHandlePointer() const = 0;
+  virtual NativeWindowHandle GetNativeWindowHandle() const = 0;
 
   // Taskbar/Dock APIs.
   enum ProgressState {
diff --git a/atom/browser/native_window_mac.h b/atom/browser/native_window_mac.h
index 716c1c881e72..053fa5abeb1e 100644
--- a/atom/browser/native_window_mac.h
+++ b/atom/browser/native_window_mac.h
@@ -104,7 +104,7 @@ class NativeWindowMac : public NativeWindow {
   gfx::NativeView GetNativeView() const override;
   gfx::NativeWindow GetNativeWindow() const override;
   gfx::AcceleratedWidget GetAcceleratedWidget() const override;
-  std::tuple<void*, int> GetNativeWindowHandlePointer() const override;
+  NativeWindowHandle GetNativeWindowHandle() const override;
   void SetProgressBar(double progress, const ProgressState state) override;
   void SetOverlayIcon(const gfx::Image& overlay,
                       const std::string& description) override;
diff --git a/atom/browser/native_window_mac.mm b/atom/browser/native_window_mac.mm
index 595018a395c6..bb7fed9c3d5c 100644
--- a/atom/browser/native_window_mac.mm
+++ b/atom/browser/native_window_mac.mm
@@ -1081,9 +1081,8 @@ gfx::AcceleratedWidget NativeWindowMac::GetAcceleratedWidget() const {
   return gfx::kNullAcceleratedWidget;
 }
 
-std::tuple<void*, int> NativeWindowMac::GetNativeWindowHandlePointer() const {
-  NSView* view = [window_ contentView];
-  return std::make_tuple(static_cast<void*>(view), sizeof(view));
+NativeWindowHandle NativeWindowMac::GetNativeWindowHandle() const {
+  return [window_ contentView];
 }
 
 void NativeWindowMac::SetProgressBar(double progress,
diff --git a/atom/browser/native_window_views.cc b/atom/browser/native_window_views.cc
index 03c2c7543cc0..05dc4c9d50ee 100644
--- a/atom/browser/native_window_views.cc
+++ b/atom/browser/native_window_views.cc
@@ -1047,9 +1047,8 @@ gfx::AcceleratedWidget NativeWindowViews::GetAcceleratedWidget() const {
   return GetNativeWindow()->GetHost()->GetAcceleratedWidget();
 }
 
-std::tuple<void*, int> NativeWindowViews::GetNativeWindowHandlePointer() const {
-  gfx::AcceleratedWidget handle = GetAcceleratedWidget();
-  return std::make_tuple(static_cast<void*>(&handle), sizeof(handle));
+NativeWindowHandle NativeWindowViews::GetNativeWindowHandle() const {
+  return GetAcceleratedWidget();
 }
 
 gfx::Rect NativeWindowViews::ContentBoundsToWindowBounds(
diff --git a/atom/browser/native_window_views.h b/atom/browser/native_window_views.h
index 05954cfde4af..8b50e707da84 100644
--- a/atom/browser/native_window_views.h
+++ b/atom/browser/native_window_views.h
@@ -124,7 +124,7 @@ class NativeWindowViews : public NativeWindow,
   bool IsVisibleOnAllWorkspaces() override;
 
   gfx::AcceleratedWidget GetAcceleratedWidget() const override;
-  std::tuple<void*, int> GetNativeWindowHandlePointer() const override;
+  NativeWindowHandle GetNativeWindowHandle() const override;
 
   gfx::Rect ContentBoundsToWindowBounds(const gfx::Rect& bounds) const override;
   gfx::Rect WindowBoundsToContentBounds(const gfx::Rect& bounds) const override;
diff --git a/spec/.hash b/spec/.hash
new file mode 100644
index 000000000000..cac3ed15db04
--- /dev/null
+++ b/spec/.hash
@@ -0,0 +1,2 @@
+24d8222313d02ffe2a2181b9c82fbfa5ab8372aec6442839302622fbf45cbe47
+null
\ No newline at end of file
diff --git a/spec/api-browser-window-spec.js b/spec/api-browser-window-spec.js
index 3230e1d2287c..0802e5302d48 100644
--- a/spec/api-browser-window-spec.js
+++ b/spec/api-browser-window-spec.js
@@ -2790,6 +2790,19 @@ describe('BrowserWindow module', () => {
     })
   })
 
+  describe('window.getNativeWindowHandle()', () => {
+    if (!nativeModulesEnabled) {
+      this.skip()
+    }
+
+    it('returns valid handle', () => {
+      // The module's source code is hosted at
+      // https://github.com/electron/node-is-valid-window
+      const isValidWindow = remote.require('is-valid-window')
+      assert.ok(isValidWindow(w.getNativeWindowHandle()))
+    })
+  })
+
   describe('extensions and dev tools extensions', () => {
     let showPanelTimeoutId
 
diff --git a/spec/package-lock.json b/spec/package-lock.json
index 1e96408beac5..8b897bcedd82 100644
--- a/spec/package-lock.json
+++ b/spec/package-lock.json
@@ -16,22 +16,21 @@
       }
     },
     "ansi-regex": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
-      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
-      "dev": true
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
     },
     "aproba": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/aproba/-/aproba-1.2.0.tgz",
       "integrity": "sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw==",
-      "dev": true
+      "optional": true
     },
     "are-we-there-yet": {
       "version": "1.1.5",
       "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz",
       "integrity": "sha512-5hYdAkZlcG8tOLujVDTgCT+uPX0VnpAH28gWsLfzpXYm7wP6mp5Q/gYyR7YQ0cKVJcXJnl3j2kpBan13PtQf6w==",
-      "dev": true,
+      "optional": true,
       "requires": {
         "delegates": "^1.0.0",
         "readable-stream": "^2.0.6"
@@ -56,43 +55,38 @@
       "dev": true
     },
     "basic-auth": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-2.0.0.tgz",
-      "integrity": "sha1-AV2z81PgLlY3d1X5YnQuiYHnu7o=",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-2.0.1.tgz",
+      "integrity": "sha512-NF+epuEdnUYVlGuhaxbbq+dvJttwLnGY+YixlXlME5KpQ5W3CnXA5cVTneY3SPbPDRkcjMbifrwmFYcClgOZeg==",
       "dev": true,
       "requires": {
-        "safe-buffer": "5.1.1"
-      },
-      "dependencies": {
-        "safe-buffer": {
-          "version": "5.1.1",
-          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.1.tgz",
-          "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg==",
-          "dev": true
-        }
+        "safe-buffer": "5.1.2"
       }
     },
     "bindings": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.3.0.tgz",
-      "integrity": "sha512-DpLh5EzMR2kzvX1KIlVC0VkC3iZtHKTgdtZ0a3pglBZdaQFjt5S9g9xd1lE+YvXyfd6mtCeRnrUfOLYiTMlNSw==",
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.4.0.tgz",
+      "integrity": "sha512-7znEVX22Djn+nYjxCWKDne0RRloa9XfYa84yk3s+HkE3LpDYZmhArYr9O9huBoHY3/oXispx5LorIX7Sl2CgSQ==",
       "dev": true,
-      "optional": true
+      "optional": true,
+      "requires": {
+        "file-uri-to-path": "1.0.0"
+      }
     },
     "bl": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/bl/-/bl-1.2.2.tgz",
       "integrity": "sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==",
-      "dev": true,
+      "optional": true,
       "requires": {
         "readable-stream": "^2.3.5",
         "safe-buffer": "^5.1.1"
       }
     },
     "bluebird": {
-      "version": "3.5.1",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.1.tgz",
-      "integrity": "sha512-MKiLiV+I1AA596t9w1sQJ8jkiSr5+ZKi0WKrYGUn6d1Fx+Ij4tIj+m2WMQSGczs5jZVxV339chE8iwk6F64wjA==",
+      "version": "3.5.3",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.3.tgz",
+      "integrity": "sha512-/qKPUQlaW1OyR51WeCPBvRnAlnZFUJkCSG5HzGnuIqhgyJtF+T94lFnn33eiazjRm2LAHVy2guNnaq48X9SJuw==",
       "dev": true
     },
     "brace-expansion": {
@@ -115,7 +109,7 @@
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/buffer-alloc/-/buffer-alloc-1.2.0.tgz",
       "integrity": "sha512-CFsHQgjtW1UChdXgbyJGtnm+O/uLQeZdtbDo8mfUgYXCHSM1wgrVxXm6bSyrUuErEb+4sYVGCzASBRot7zyrow==",
-      "dev": true,
+      "optional": true,
       "requires": {
         "buffer-alloc-unsafe": "^1.1.0",
         "buffer-fill": "^1.0.0"
@@ -125,13 +119,13 @@
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz",
       "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg==",
-      "dev": true
+      "optional": true
     },
     "buffer-fill": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/buffer-fill/-/buffer-fill-1.0.0.tgz",
       "integrity": "sha1-+PeLdniYiO858gXNY39o5wISKyw=",
-      "dev": true
+      "optional": true
     },
     "camelcase": {
       "version": "4.1.0",
@@ -140,17 +134,17 @@
       "dev": true
     },
     "chai": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-4.1.2.tgz",
-      "integrity": "sha1-D2RYS6ZC8PKs4oBiefTwbKI61zw=",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.2.0.tgz",
+      "integrity": "sha512-XQU3bhBukrOsQCuwZndwGcCVQHyZi53fQ6Ys1Fym7E4olpIqqZZhhoFJoaKVvV17lWQoXYwgWN2nF5crA8J2jw==",
       "dev": true,
       "requires": {
-        "assertion-error": "^1.0.1",
-        "check-error": "^1.0.1",
-        "deep-eql": "^3.0.0",
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.2",
+        "deep-eql": "^3.0.1",
         "get-func-name": "^2.0.0",
-        "pathval": "^1.0.0",
-        "type-detect": "^4.0.0"
+        "pathval": "^1.1.0",
+        "type-detect": "^4.0.5"
       }
     },
     "chai-as-promised": {
@@ -178,7 +172,7 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.1.tgz",
       "integrity": "sha512-j38EvO5+LHX84jlo6h4UzmOwi0UgW61WRyPtJz4qaadK5eY3BTS5TY/S1Stc3Uk2lIM6TPevAlULiEJwie860g==",
-      "dev": true
+      "optional": true
     },
     "cliui": {
       "version": "4.1.0",
@@ -189,13 +183,45 @@
         "string-width": "^2.1.1",
         "strip-ansi": "^4.0.0",
         "wrap-ansi": "^2.0.0"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+          "dev": true,
+          "requires": {
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^4.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^3.0.0"
+          }
+        }
       }
     },
     "code-point-at": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
-      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
-      "dev": true
+      "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c="
     },
     "coffee-script": {
       "version": "1.12.7",
@@ -218,14 +244,12 @@
     "console-control-strings": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
-      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
+      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4="
     },
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
-      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
-      "dev": true
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
     },
     "cross-spawn": {
       "version": "5.1.0",
@@ -261,9 +285,9 @@
       }
     },
     "debug": {
-      "version": "2.6.9",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
-      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+      "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
       "dev": true,
       "requires": {
         "ms": "2.0.0"
@@ -279,7 +303,7 @@
       "version": "3.3.0",
       "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-3.3.0.tgz",
       "integrity": "sha1-gKTdMjdIOEv6JICDYirt7Jgq3/M=",
-      "dev": true,
+      "optional": true,
       "requires": {
         "mimic-response": "^1.0.0"
       }
@@ -297,13 +321,13 @@
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.6.0.tgz",
       "integrity": "sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA==",
-      "dev": true
+      "optional": true
     },
     "delegates": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
       "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=",
-      "dev": true
+      "optional": true
     },
     "depd": {
       "version": "1.1.2",
@@ -321,7 +345,7 @@
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
       "integrity": "sha1-+hN8S9aY7fVc1c0CrFWfkaTEups=",
-      "dev": true
+      "optional": true
     },
     "diff": {
       "version": "3.5.0",
@@ -357,7 +381,6 @@
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
       "integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
-      "dev": true,
       "requires": {
         "once": "^1.4.0"
       }
@@ -381,18 +404,18 @@
       "dev": true
     },
     "event-stream": {
-      "version": "3.3.4",
-      "resolved": "https://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz",
-      "integrity": "sha1-SrTJoPWlTbkzi0w02Gv86PSzVXE=",
+      "version": "3.3.5",
+      "resolved": "https://registry.npmjs.org/event-stream/-/event-stream-3.3.5.tgz",
+      "integrity": "sha512-vyibDcu5JL20Me1fP734QBH/kenBGLZap2n0+XXM7mvuUPzJ20Ydqj1aKcIeMdri1p+PU+4yAKugjN8KCVst+g==",
       "dev": true,
       "requires": {
-        "duplexer": "~0.1.1",
-        "from": "~0",
-        "map-stream": "~0.1.0",
-        "pause-stream": "0.0.11",
-        "split": "0.3",
-        "stream-combiner": "~0.0.4",
-        "through": "~2.3.1"
+        "duplexer": "^0.1.1",
+        "from": "^0.1.7",
+        "map-stream": "0.0.7",
+        "pause-stream": "^0.0.11",
+        "split": "^1.0.1",
+        "stream-combiner": "^0.2.2",
+        "through": "^2.3.8"
       }
     },
     "execa": {
@@ -414,17 +437,24 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/expand-template/-/expand-template-1.1.1.tgz",
       "integrity": "sha512-cebqLtV8KOZfw0UI8TEFWxtczxxC1jvyUvx6H4fyp1K1FN7A4Q+uggVUlOsI1K8AGU0rwOGqP8nCapdrw8CYQg==",
-      "dev": true
+      "optional": true
     },
     "fd-slicer": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/fd-slicer/-/fd-slicer-1.0.1.tgz",
-      "integrity": "sha1-i1vL2ewyfFBBv5qwI/1nUPEXfmU=",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/fd-slicer/-/fd-slicer-1.1.0.tgz",
+      "integrity": "sha1-JcfInLH5B3+IkbvmHY85Dq4lbx4=",
       "dev": true,
       "requires": {
         "pend": "~1.2.0"
       }
     },
+    "file-uri-to-path": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
+      "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==",
+      "dev": true,
+      "optional": true
+    },
     "find-up": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
@@ -450,7 +480,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs-constants/-/fs-constants-1.0.0.tgz",
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+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+          "dev": true,
+          "requires": {
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^4.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^3.0.0"
+          }
+        }
       }
     },
     "yargs-parser": {
diff --git a/spec/package.json b/spec/package.json
index a81fda3cc6a2..e5f83b7a2bc2 100644
--- a/spec/package.json
+++ b/spec/package.json
@@ -15,6 +15,7 @@
     "dbus-native": "^0.2.5",
     "dirty-chai": "^2.0.1",
     "graceful-fs": "^4.1.11",
+    "is-valid-window": "^0.0.3",
     "mkdirp": "^0.5.1",
     "mocha": "^5.2.0",
     "mocha-junit-reporter": "^1.17.0",