diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..6766a0f
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,51 @@
+defaults: &defaults
+  shell: /bin/bash --login
+  docker:
+    - image: circleci/node:8.12.0-stretch
+
+version: 2
+jobs:
+  test:
+    <<: *defaults
+    steps:
+      - checkout
+      - run: npm ci
+      - run: npm test
+      - run: npm run coverage
+      - persist_to_workspace:
+          root: ~/project
+          paths:
+            - .
+  publish:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: ~/project
+      - run: sudo apt-get update
+      - run: sudo apt-get install -y python-pip
+      - run: sudo pip install awscli credstash
+      - run: echo "//registry.npmjs.org/:_authToken=$(credstash -r eu-west-1 get npm-auth-token-circleci)" > ~/.npmrc
+      - run:
+          command: |
+            set -e
+            PACKAGE_VERSION=$(jq -r '[.name, .version] | join("@")' package.json)
+            if test -z "$(npm info $PACKAGE_VERSION 2> /dev/null)"
+            then
+                echo "Publishing $PACKAGE_VERSION"
+                npm publish
+            else
+                echo "Not publishing $PACKAGE_VERSION, already exists."
+            fi
+            
+workflows:              
+  version: 2
+  all:
+    jobs:
+      - test
+      - publish:
+          context: phdv-aws
+          requires:
+            - test
+          filters:
+            branches:
+              only: master
diff --git a/circle.yml b/circle.yml
deleted file mode 100644
index 9b67d4e..0000000
--- a/circle.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-machine:
-  node:
-    version: 4.0
-
-test:
-  override:
-    - npm run security 
-    - npm test
-    - npm run coverage 
-
-deployment:
-  production:
-    branch: master
-    commands:
-      - echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" > ~/.npmrc
-      - npm version "1.0.$CIRCLE_BUILD_NUM" --no-git-tag-version
-      - npm publish
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..98518dd
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,19 @@
+export = Credstash;
+
+declare class Credstash {
+  list(options: Credstash.IOptions, callback: Credstash.Callback<string[]>): void;
+  list(callback: Credstash.Callback<string[]>): void;
+
+  get(value: string, options: Credstash.IOptions, callback: Credstash.Callback<string>): void;
+  get(value: string, callback: Credstash.Callback<string>): void;
+}
+
+declare namespace Credstash {
+  type Callback<T> = (err: Error | null, response: T) => void;
+
+  interface IOptions {
+    limit?: number,
+    region?: string,
+    table?: string
+  }
+}
\ No newline at end of file
diff --git a/index.js b/index.js
index 4c3c602..57b1b2a 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,5 @@
 const async = require('async');
+const getAWS = require('./lib/aws').getAWS;
 const decrypter = require('./lib/decrypter');
 const encoder = require('./lib/encoder');
 const hmac = require('./lib/hmac');
@@ -7,24 +8,27 @@ const secrets = require('./lib/secrets');
 const xtend = require('xtend');
 
 const defaults = {
-  limit: 1
+  limit: 1,
+  region: process.env.AWS_DEFAULT_REGION || 'eu-west-1',
+  table: 'credential-store'
 };
 
 function Credstash(config) {
-  this.table = config ? config.table : undefined;
+  this.config = xtend(defaults, config);
 }
 
 Credstash.prototype.list = function(options, done) {
   if (typeof options === 'function') {
     done = options;
-    options = defaults;
+    options = this.config;
   } else {
-    options = xtend(defaults, options);
+    options = xtend(this.config, options);
   }
 
+  const AWS = getAWS(options);
   return async.waterfall([
-    async.apply(secrets.list, this.table, options),
-    async.apply(keys.decrypt),
+    async.apply(secrets.list, AWS, options),
+    async.apply(keys.decrypt, AWS),
     async.apply(hmac.check),
     async.apply(decrypter.decryptedObject)
   ], function (err, secrets) {
@@ -39,14 +43,15 @@ Credstash.prototype.list = function(options, done) {
 Credstash.prototype.get = function(name, options, done) {
   if (typeof options === 'function') {
     done = options;
-    options = defaults;
+    options = this.config;
   } else {
-    options = xtend(defaults, options);
+    options = xtend(this.config, options);
   }
 
+  const AWS = getAWS(options);
   return async.waterfall([
-    async.apply(secrets.get, this.table, name, options),
-    async.apply(keys.decrypt),
+    async.apply(secrets.get, AWS, name, options),
+    async.apply(keys.decrypt, AWS),
     async.apply(hmac.check),
     async.apply(decrypter.decryptedList)
   ], function (err, secrets) {
diff --git a/lib/aws.js b/lib/aws.js
new file mode 100644
index 0000000..50f28af
--- /dev/null
+++ b/lib/aws.js
@@ -0,0 +1,12 @@
+const AWS = require('aws-sdk');
+
+function getAWS(options) {
+  if (options && options.region) {
+    AWS.config.update({region: options.region});
+  }
+  return AWS;
+}
+
+module.exports = {
+  getAWS,
+};
diff --git a/lib/decrypter.js b/lib/decrypter.js
index 4bb5c87..2e0c241 100644
--- a/lib/decrypter.js
+++ b/lib/decrypter.js
@@ -6,7 +6,7 @@ function decryptedString(stash) {
   const value = encoder.decode(stash.contents);
   const aesCtr = new aesjs.ModeOfOperation.ctr(key, new aesjs.Counter(1));
   const decryptedBytes = aesCtr.decrypt(value);
-  return decryptedBytes.toString();
+  return aesjs.utils.utf8.fromBytes(decryptedBytes);
 }
 
 module.exports = {
diff --git a/lib/keys.js b/lib/keys.js
index 5ce7005..4f45f0f 100644
--- a/lib/keys.js
+++ b/lib/keys.js
@@ -1,17 +1,14 @@
-const AWS = require('aws-sdk');
 const async = require('async');
 const encoder = require('./encoder');
 
-if (typeof process.env.AWS_DEFAULT_REGION !== 'undefined') {
-  AWS.config.update({region: process.env.AWS_DEFAULT_REGION});
-}
-
-function decrypt(key, done) {
-  var params = {
-    CiphertextBlob: encoder.decode(key)
-  };
+function decrypt(AWS) {
+  return function(key, done) {
+    var params = {
+      CiphertextBlob: encoder.decode(key)
+    };
 
-  return new AWS.KMS().decrypt(params, done);
+    return new AWS.KMS().decrypt(params, done);
+  }
 }
 
 function split(stashes, decryptedKeys, done) {
@@ -26,9 +23,9 @@ function split(stashes, decryptedKeys, done) {
 }
 
 module.exports = {
-  decrypt: (stashes, done) => {
+  decrypt: (AWS, stashes, done) => {
     return async.waterfall([
-      async.apply(async.map, stashes.map(s => s.key), decrypt),
+      async.apply(async.map, stashes.map(s => s.key), decrypt(AWS)),
       async.apply(split, stashes)
     ], done);
   }
diff --git a/lib/secrets.js b/lib/secrets.js
index 02d7097..ef60fd2 100644
--- a/lib/secrets.js
+++ b/lib/secrets.js
@@ -1,10 +1,5 @@
-const AWS = require('aws-sdk');
 const async = require('async');
 
-if (typeof process.env.AWS_DEFAULT_REGION !== 'undefined') {
-  AWS.config.update({region: process.env.AWS_DEFAULT_REGION});
-}
-
 // Blatantly borrowed from https://www.electrictoolbox.com/pad-number-zeroes-javascript/
 function pad(number, length) {
   var str = '' + number;
@@ -23,9 +18,9 @@ function makeVersion(version) {
   };
 }
 
-function scan(table, options, done) {
+function scan(AWS, options, done) {
   var params = {
-    TableName: table || 'credential-store',
+    TableName: options.table || 'credential-store',
     ConsistentRead: true,
     ScanFilter: {}
   };
@@ -37,9 +32,9 @@ function scan(table, options, done) {
   return new AWS.DynamoDB().scan(params, done);
 }
 
-function find(table, name, options, done) {
+function find(AWS, name, options, done) {
   var params = {
-    TableName: table || 'credential-store',
+    TableName: options.table || 'credential-store',
     ConsistentRead: true,
     Limit: options.limit,
     ScanIndexForward: false,
@@ -76,15 +71,15 @@ function map(name, data, done) {
 }
 
 module.exports = {
-  get: (table, name, options, done) => {
+  get: (AWS, name, options, done) => {
     return async.waterfall([
-      async.apply(find, table, name, options),
+      async.apply(find, AWS, name, options),
       async.apply(map, name),
     ], done);
   },
-  list: (table, options, done) => {
+  list: (AWS, options, done) => {
     return async.waterfall([
-      async.apply(scan, table, options),
+      async.apply(scan, AWS, options),
       async.apply(map, 'all secrets'),
     ], done);
   }
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..2b401fc
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,3433 @@
+{
+  "name": "@pizza-hut/credstash",
+  "version": "1.3.1",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "@pizza-hut/credstash",
+      "version": "1.3.1",
+      "license": "MIT",
+      "dependencies": {
+        "aes-js": "3.1.2",
+        "async": "^3.2.0",
+        "aws-sdk": "2.451.0",
+        "xtend": "4.0.1"
+      },
+      "devDependencies": {
+        "aws-sdk-mock": "4.4.0",
+        "chai": "4.2.0",
+        "istanbul": "0.4.5",
+        "mocha": "6.1.4"
+      }
+    },
+    "node_modules/@sinonjs/commons": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/@sinonjs/commons/-/commons-1.4.0.tgz",
+      "integrity": "sha512-9jHK3YF/8HtJ9wCAbG+j8cD0i0+ATS9A7gXFqS36TblLPNy6rEEc+SB0imo91eCboGaBYGV/MT1/br/J+EE7Tw==",
+      "dev": true,
+      "dependencies": {
+        "type-detect": "4.0.8"
+      }
+    },
+    "node_modules/@sinonjs/formatio": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/@sinonjs/formatio/-/formatio-3.2.1.tgz",
+      "integrity": "sha512-tsHvOB24rvyvV2+zKMmPkZ7dXX6LSLKZ7aOtXY6Edklp0uRcgGpOsQTTGTcWViFyx4uhWc6GV8QdnALbIbIdeQ==",
+      "dev": true,
+      "dependencies": {
+        "@sinonjs/commons": "^1",
+        "@sinonjs/samsam": "^3.1.0"
+      }
+    },
+    "node_modules/@sinonjs/samsam": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-3.3.1.tgz",
+      "integrity": "sha512-wRSfmyd81swH0hA1bxJZJ57xr22kC07a1N4zuIL47yTS04bDk6AoCkczcqHEjcRPmJ+FruGJ9WBQiJwMtIElFw==",
+      "dev": true,
+      "dependencies": {
+        "@sinonjs/commons": "^1.0.2",
+        "array-from": "^2.1.1",
+        "lodash": "^4.17.11"
+      }
+    },
+    "node_modules/@sinonjs/text-encoding": {
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/@sinonjs/text-encoding/-/text-encoding-0.7.1.tgz",
+      "integrity": "sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==",
+      "dev": true
+    },
+    "node_modules/abbrev": {
+      "version": "1.0.9",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.9.tgz",
+      "integrity": "sha1-kbR5JYinc4wl813W9jdSovh3YTU=",
+      "dev": true
+    },
+    "node_modules/aes-js": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/aes-js/-/aes-js-3.1.2.tgz",
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+    },
+    "node_modules/amdefine": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
+      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
+      "dev": true,
+      "optional": true,
+      "engines": {
+        "node": ">=0.4.2"
+      }
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+    "node_modules/ansi-colors": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.3.tgz",
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+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
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+      },
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+      "dependencies": {
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+      "dev": true,
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+    },
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+        "events": "1.1.1",
+        "ieee754": "1.1.8",
+        "jmespath": "0.15.0",
+        "querystring": "0.2.0",
+        "sax": "1.2.1",
+        "url": "0.10.3",
+        "uuid": "3.3.2",
+        "xml2js": "0.4.19"
+      },
+      "engines": {
+        "node": ">= 0.8.0"
+      }
+    },
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+        "sinon": "^7.3.1",
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+      }
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+      "dependencies": {
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+        "check-error": "^1.0.2",
+        "deep-eql": "^3.0.1",
+        "get-func-name": "^2.0.0",
+        "pathval": "^1.1.0",
+        "type-detect": "^4.0.5"
+      },
+      "engines": {
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+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
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+      "dependencies": {
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+        "escape-string-regexp": "^1.0.5",
+        "supports-color": "^5.3.0"
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+      "integrity": "sha1-V00xLt2Iu13YkS6Sht1sCu1KrII=",
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+      "engines": {
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+      "dependencies": {
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+}
diff --git a/package.json b/package.json
index a2f2312..7692f20 100644
--- a/package.json
+++ b/package.json
@@ -1,40 +1,36 @@
 {
-  "name": "credstash",
-  "version": "1.0.1",
+  "name": "@pizza-hut/credstash",
+  "version": "1.3.1",
   "description": "Module for reading credstash secrets",
   "main": "index.js",
   "scripts": {
-    "security": "nsp check",
-    "test": "istanbul cover _mocha -dir $CIRCLE_ARTIFACTS",
-    "coverage": "istanbul check-coverage --statement 80 $CIRCLE_ARTIFACTS/coverage.json",
-    "coveralls": "cat $CIRCLE_ARTIFACTS/lcov.info | coveralls"
+    "test": "istanbul cover _mocha",
+    "coverage": "istanbul check-coverage --statement 80"
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/roylines/node-credstash.git"
+    "url": "git+https://github.com/pizzahutuk/node-credstash.git"
   },
   "keywords": [
     "credstash",
     "secrets"
   ],
   "author": "Roy Lines",
-  "license": "ISC",
+  "license": "MIT",
   "bugs": {
-    "url": "https://github.com/roylines/node-credstash/issues"
+    "url": "https://github.com/pizzahutuk/node-credstash/issues"
   },
-  "homepage": "https://github.com/roylines/node-credstash#readme",
+  "homepage": "https://github.com/pizzahutuk/node-credstash#readme",
   "devDependencies": {
-    "aws-sdk-mock": "1.0.5",
-    "chai": "3.5.0",
-    "coveralls": "2.11.6",
-    "istanbul": "0.4.2",
-    "mocha": "2.4.5",
-    "nsp": "2.6.2"
+    "aws-sdk-mock": "4.4.0",
+    "chai": "4.2.0",
+    "istanbul": "0.4.5",
+    "mocha": "6.1.4"
   },
   "dependencies": {
-    "aes-js": "0.2.2",
-    "async": "1.5.2",
-    "aws-sdk": "2.2.35",
+    "aes-js": "3.1.2",
+    "async": "^3.2.0",
+    "aws-sdk": "2.451.0",
     "xtend": "4.0.1"
   }
 }