diff --git a/packages/core/js-libs/esprima/README.md b/packages/core/js-libs/esprima/README.md
index ad8d9f613..0ccc1fa7c 100644
--- a/packages/core/js-libs/esprima/README.md
+++ b/packages/core/js-libs/esprima/README.md
@@ -1,7 +1,7 @@
 **Esprima** ([esprima.org](http://esprima.org), BSD license) is a high performance,
 standard-compliant [ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm)
 parser written in ECMAScript (also popularly known as
-[JavaScript](http://en.wikipedia.org/wiki/JavaScript>JavaScript)).
+[JavaScript](http://en.wikipedia.org/wiki/JavaScript).
 Esprima is created and maintained by [Ariya Hidayat](http://twitter.com/ariyahidayat),
 with the help of [many contributors](https://github.com/ariya/esprima/contributors).
 
@@ -9,7 +9,7 @@ with the help of [many contributors](https://github.com/ariya/esprima/contributo
 
 - Full support for ECMAScript 5.1 ([ECMA-262](http://www.ecma-international.org/publications/standards/Ecma-262.htm))
 - Sensible [syntax tree format](http://esprima.org/doc/index.html#ast) compatible with Mozilla
-[Parser AST](https://developer.mozilla.org/en/SpiderMonkey/Parser_API)
+[Parser AST](https://web.archive.org/web/20201119095346/https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Parser_API)
 - Optional tracking of syntax node location (index-based and line-column)
 - Heavily tested (> 700 [unit tests](http://esprima.org/test/) with [full code coverage](http://esprima.org/test/coverage.html))
 - [Partial support](http://esprima.org/doc/es6.html) for ECMAScript 6
@@ -19,6 +19,6 @@ language tools, from [code instrumentation](http://esprima.org/demo/functiontrac
 to [editor autocompletion](http://esprima.org/demo/autocomplete.html).
 
 Esprima runs on many popular web browsers, as well as other ECMAScript platforms such as
-[Rhino](http://www.mozilla.org/rhino), [Nashorn](http://openjdk.java.net/projects/nashorn/), and [Node.js](https://npmjs.org/package/esprima).
+[Rhino](https://github.com/mozilla/rhino), [Nashorn](http://openjdk.java.net/projects/nashorn/), and [Node.js](https://npmjs.org/package/esprima).
 
 For more information, check the web site [esprima.org](http://esprima.org).