diff --git a/lib/__tests__/build-files.tests.js b/lib/__tests__/build-files.tests.js
index 55155ef716..fe92052e7b 100644
--- a/lib/__tests__/build-files.tests.js
+++ b/lib/__tests__/build-files.tests.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const cssnano = require('cssnano');
 const filepath = require('filepath');
 const fm = require('front-matter');
diff --git a/lib/core/MarkdownBlock.js b/lib/core/MarkdownBlock.js
index 1568f9ff47..a370593d5a 100644
--- a/lib/core/MarkdownBlock.js
+++ b/lib/core/MarkdownBlock.js
@@ -5,13 +5,12 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-/**
- * The MarkdownBlock component is used to parse markdown and render to HTML.
- */
-
 const React = require('react');
 const Remarkable = require('./Remarkable');
 
+/**
+ * The MarkdownBlock component is used to parse markdown and render to HTML.
+ */
 class MarkdownBlock extends React.Component {
   render() {
     return <Remarkable source={this.props.children} />;
diff --git a/lib/core/Remarkable.js b/lib/core/Remarkable.js
index c25cdcfdcb..edb4400af8 100644
--- a/lib/core/Remarkable.js
+++ b/lib/core/Remarkable.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 'use strict';
 
 const React = require('react');
diff --git a/lib/core/__tests__/anchors.tests.js b/lib/core/__tests__/anchors.tests.js
index c9530f265b..4af6032bcd 100644
--- a/lib/core/__tests__/anchors.tests.js
+++ b/lib/core/__tests__/anchors.tests.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const anchors = require('../anchors');
 
 const md = {
diff --git a/lib/core/__tests__/getTOC.tests.js b/lib/core/__tests__/getTOC.tests.js
index da0e62a005..0826df9378 100644
--- a/lib/core/__tests__/getTOC.tests.js
+++ b/lib/core/__tests__/getTOC.tests.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const path = require('path');
 const readFileSync = require('fs').readFileSync;
 const getTOC = require('../getTOC');
diff --git a/lib/core/__tests__/toSlug.tests.js b/lib/core/__tests__/toSlug.tests.js
index 9d472c547c..74397e4395 100644
--- a/lib/core/__tests__/toSlug.tests.js
+++ b/lib/core/__tests__/toSlug.tests.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const toSlug = require('../toSlug');
 
 [
diff --git a/lib/core/anchors.js b/lib/core/anchors.js
index 969b5b7634..1b5a41db0a 100644
--- a/lib/core/anchors.js
+++ b/lib/core/anchors.js
@@ -4,6 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
+
 const toSlug = require('./toSlug.js');
 
 /**
diff --git a/lib/core/renderMarkdown.js b/lib/core/renderMarkdown.js
index b219bc2b2d..f8327540c0 100644
--- a/lib/core/renderMarkdown.js
+++ b/lib/core/renderMarkdown.js
@@ -7,6 +7,7 @@
 
 const hljs = require('highlight.js');
 const Markdown = require('remarkable');
+
 const anchors = require('./anchors.js');
 
 const CWD = process.cwd();
diff --git a/lib/static/css/main.css b/lib/static/css/main.css
index 0c8ff7cd4e..7086e76481 100644
--- a/lib/static/css/main.css
+++ b/lib/static/css/main.css
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 /* Reset */
 html, body, div, span, applet, object, iframe,
 h1, h2, h3, h4, h5, h6, p, blockquote, pre,
diff --git a/website/static/css/custom.css b/website/static/css/custom.css
index fd3fedc79f..3356af39ee 100644
--- a/website/static/css/custom.css
+++ b/website/static/css/custom.css
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 .testimonials img {
   border-radius: 50%;
 }