diff --git a/Makefile b/Makefile
index 00716ac..786bd65 100644
--- a/Makefile
+++ b/Makefile
@@ -1,18 +1,13 @@
 default: website/miniLockLib.js website/tests.js website/index.js website/annotated_code.js website/annotated_code .window_tests_address
 
 # Create a standalone copy of miniLockLib.js in the website folder for use in web agent windows.
-website/miniLockLib.js: library/%.coffee library.compiled/scrypt-async.js
+website/miniLockLib.js: library/%.coffee
 	browserify library.compiled/index.js --standalone miniLockLib > website/miniLockLib.js
 
 # Compile CoffeeScript library files to the library.compiled folder.
 library/%.coffee:
 	coffee --compile --output library.compiled library/*.coffee
 
-# Download scrypt-async.js and save it in the library.compiled folder.
-library.compiled/scrypt-async.js:
-	curl -s https://raw.githubusercontent.com/dchest/scrypt-async-js/master/scrypt-async.js \
-		> library.compiled/scrypt-async.js
-
 # # Tests
 
 # Compile CoffeeScript tests to the tests.compiled folder.
diff --git a/README.md b/README.md
index 2b30c50..9509e09 100644
--- a/README.md
+++ b/README.md
@@ -63,11 +63,17 @@ Pass `data` and `keys` when you `decrypt` a file:
 
 __Digging In__
 
+You will need [GNU Make](https://www.gnu.org/software/make/) and [Node.js](https://nodejs.org/en/) on your computer to compile, run and test the code in this project. If you can run `make --version` and `node --version` without errors on the command line then you should be all set. If you don’t already have a copy Node.js, we recommend you [download the installer for your operating system](https://nodejs.org/en/download/) from the official website.
+
 `git clone https://github.com/45678/miniLockLib.git` to get the source code.
 
+`cd miniLockLib`
+
+`npm install` to download the dependencies defined in `package.json`.
+
 `make` to compile [CoffeeScript](http://www.coffeescript.org/) files into [ECMAScript](http://www.ecmascript.org/) files in the `library.compiled`, `tests.compiled` and `website` folders.
 
-`make clean` to start over.
+`make clean` to remove all generated files and start over.
 
 `npm start` to automatically re-compile source files as you make changes.
 
diff --git a/library.compiled/KeyPairOperation.js b/library.compiled/KeyPairOperation.js
index c078878..cc63155 100644
--- a/library.compiled/KeyPairOperation.js
+++ b/library.compiled/KeyPairOperation.js
@@ -9,7 +9,7 @@
 
     NaCl = require("tweetnacl");
 
-    scrypt = require("./scrypt-async");
+    scrypt = require("scrypt-async");
 
     EmailAddress = require("./EmailAddress");
 
diff --git a/library.compiled/index.js b/library.compiled/index.js
index 14853ed..8d8c763 100644
--- a/library.compiled/index.js
+++ b/library.compiled/index.js
@@ -47,6 +47,6 @@
 
   miniLockLib.NaCl.stream = require("nacl-stream").stream;
 
-  miniLockLib.scrypt = require("./scrypt-async");
+  miniLockLib.scrypt = require("scrypt-async");
 
 }).call(this);
diff --git a/library/KeyPairOperation.coffee b/library/KeyPairOperation.coffee
index aeb52e3..7d00398 100644
--- a/library/KeyPairOperation.coffee
+++ b/library/KeyPairOperation.coffee
@@ -1,7 +1,7 @@
 module.exports = class KeyPairOperation
   BLAKE2s = require "./BLAKE2s"
   NaCl = require "tweetnacl"
-  scrypt = require "./scrypt-async"
+  scrypt = require "scrypt-async"
   EmailAddress = require "./EmailAddress"
   SecretPhrase = require "./SecretPhrase"
 
diff --git a/library/index.coffee b/library/index.coffee
index 8836d62..ec8b7e0 100644
--- a/library/index.coffee
+++ b/library/index.coffee
@@ -34,4 +34,4 @@ miniLockLib.BLAKE2s     = require "./BLAKE2s"
 miniLockLib.Entropizer  = require "entropizer"
 miniLockLib.NaCl        = require "tweetnacl"
 miniLockLib.NaCl.stream = require("nacl-stream").stream
-miniLockLib.scrypt      = require "./scrypt-async"
+miniLockLib.scrypt      = require "scrypt-async"
diff --git a/package.json b/package.json
index d535ba0..9fd2dd4 100644
--- a/package.json
+++ b/package.json
@@ -6,14 +6,17 @@
   "repository": "git+https://github.com/45678/miniLockLib.git",
   "dependencies": {
     "base-58": "0.0.x",
-    "blake2s-js": "1.0.3",
-    "entropizer": "^0.1.3",
-    "nacl-stream": "0.3.3",
-    "tweetnacl": "0.12.x"
+    "blake2s-js": "1.0.x",
+    "entropizer": "0.1.x",
+    "nacl-stream": "0.3.x",
+    "scrypt-async": "1.2.x",
+    "tweetnacl": "0.13.x"
   },
   "devDependencies": {
-    "browserify": "5.9.x",
-    "coffee-script": "1.8.x",
+    "browserify": "13.0.x",
+    "coffee-script": "1.10.x",
+    "docco": "^0.7.0",
+    "tape": "4.4.x",
     "http-server": "^0.9.0",
     "tape": "2.14.x",
     "wr": "1.3.x"