diff --git a/lib/files.js b/lib/files.js
index 877fa4d..721e20c 100644
--- a/lib/files.js
+++ b/lib/files.js
@@ -6,8 +6,7 @@
 var Q = require("bluebird");
 var assert = require("assert");
 var crypto = require("crypto");
-var fs = require("fs");
-var fsp = require("fs-promise");
+var fs = require("fs-extra");
 var got = require("got");
 var mkdirp = require("mkdirp-promise");
 var path = require("path");
@@ -102,13 +101,13 @@ var extract = function extract(fromPath) {
 //   Reads a file as an UTF8 string.
 //   Returns a promise containing that string.
 var readUTF8 = function readUTF8(path) {
-  return fsp.readFile(path, { encoding: "utf8" });
+  return fs.readFile(path, { encoding: "utf8" });
 };
 
 // String ~> Promise Bool
 var isDirectory = function isDirectory(path) {
-  return fsp.exists(path).then(assert).then(function () {
-    return fsp.lstat(path);
+  return fs.exists(path).then(assert).then(function () {
+    return fs.lstat(path);
   }).then(function (stats) {
     return stats.isDirectory();
   }).catch(function () {
@@ -125,7 +124,7 @@ var directoryTree = function directoryTree(dirPath) {
         var searchOnDir = function searchOnDir(dir) {
           return search(path.join(dirPath, dir));
         };
-        return Q.all(Q.map(fsp.readdir(dirPath), searchOnDir));
+        return Q.all(Q.map(fs.readdir(dirPath), searchOnDir));
       } else {
         paths.push(dirPath);
       };
@@ -165,8 +164,8 @@ var safeDownloadArchived = function safeDownloadArchived(url) {
         }).then(function () {
           return filePath;
         }).catch(function () {
-          return fsp.exists(archiveDir).then(function (exists) {
-            return !exists ? fsp.mkdir(archiveDir) : null;
+          return fs.exists(archiveDir).then(function (exists) {
+            return !exists ? fs.mkdir(archiveDir) : null;
           }).then(function () {
             return download(url)(archivePath).onData(promise.onDataCallback);
           }).then(function () {
@@ -178,9 +177,9 @@ var safeDownloadArchived = function safeDownloadArchived(url) {
           }).then(function () {
             return search(new RegExp(fileName + "$"))(archiveDir);
           }).then(function (fp) {
-            return fsp.rename(fp[0], filePath);
+            return fs.rename(fp[0], filePath);
           }).then(function () {
-            return fsp.unlink(archivePath);
+            return fs.unlink(archivePath);
           }).then(function () {
             return fileHash ? checksum(fileHash)(filePath) : null;
           }).then(function () {
@@ -248,4 +247,4 @@ module.exports = {
   downloadArchived: downloadArchived,
   search: search,
   test: test
-};
\ No newline at end of file
+};
diff --git a/package-lock.json b/package-lock.json
index 3fdf15d..9ca0e14 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,47 +1,66 @@
 {
   "name": "swarm-js",
-  "version": "0.1.35",
+  "version": "0.1.37",
   "lockfileVersion": 1,
+  "requires": true,
   "dependencies": {
     "accepts": {
-      "version": "1.3.3",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.3.tgz",
-      "integrity": "sha1-w8p0NJOGSMPg2cHjKN1otiLChMo="
+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.4.tgz",
+      "integrity": "sha1-hiRnWMfdbSGmR0/whKR0DsBesh8=",
+      "requires": {
+        "mime-types": "2.1.17",
+        "negotiator": "0.6.1"
+      }
     },
     "ajv": {
-      "version": "4.11.8",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-4.11.8.tgz",
-      "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY="
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.3.0.tgz",
+      "integrity": "sha1-RBT/dKUIecII7l/cgm4ywwNUnto=",
+      "requires": {
+        "co": "4.6.0",
+        "fast-deep-equal": "1.0.0",
+        "fast-json-stable-stringify": "2.0.0",
+        "json-schema-traverse": "0.3.1"
+      }
     },
     "ansi-regex": {
-      "version": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
       "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
       "dev": true
     },
     "ansi-styles": {
-      "version": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
       "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
       "dev": true
     },
-    "any-promise": {
-      "version": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
-      "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
-    },
     "anymatch": {
-      "version": "https://registry.npmjs.org/anymatch/-/anymatch-1.3.0.tgz",
-      "integrity": "sha1-o+Uvo5FoyCX/V7AkgSbOWo/5VQc=",
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-1.3.2.tgz",
+      "integrity": "sha512-0XNayC8lTHQ2OI8aljNCN3sSx6hsr/1+rlcDAotXJR7C1oZZHCNsfpbKwMjRA3Uqb5tF1Rae2oloTr4xpq+WjA==",
       "dev": true,
-      "optional": true
+      "optional": true,
+      "requires": {
+        "micromatch": "2.3.11",
+        "normalize-path": "2.1.1"
+      }
     },
     "arr-diff": {
-      "version": "https://registry.npmjs.org/arr-diff/-/arr-diff-2.0.0.tgz",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-2.0.0.tgz",
       "integrity": "sha1-jzuCf5Vai9ZpaX5KQlasPOrjVs8=",
       "dev": true,
-      "optional": true
+      "optional": true,
+      "requires": {
+        "arr-flatten": "1.1.0"
+      }
     },
     "arr-flatten": {
-      "version": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.0.3.tgz",
-      "integrity": "sha1-onTthawIhJtr14R8RYB0XcUa37E=",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
+      "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==",
       "dev": true,
       "optional": true
     },
@@ -51,42 +70,43 @@
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
     "array-unique": {
-      "version": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
       "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
       "dev": true,
       "optional": true
     },
-    "arrify": {
-      "version": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
-      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
-      "dev": true,
-      "optional": true
-    },
     "asn1": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz",
       "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y="
     },
     "assert-plus": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz",
-      "integrity": "sha1-104bh+ev/A24qttwIfP+SBAasjQ="
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
     },
     "async-each": {
-      "version": "https://registry.npmjs.org/async-each/-/async-each-1.0.1.tgz",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.1.tgz",
       "integrity": "sha1-GdOGodntxufByF04iu28xW0zYC0=",
       "dev": true,
       "optional": true
     },
+    "async-limiter": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
+      "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg=="
+    },
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
       "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
     },
     "aws-sign2": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz",
-      "integrity": "sha1-FDQt0428yU0OW4fXY81jYSwOeU8="
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
+      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
     },
     "aws4": {
       "version": "1.6.0",
@@ -94,272 +114,667 @@
       "integrity": "sha1-g+9cqGCysy5KDe7e6MdxudtXRx4="
     },
     "babel-cli": {
-      "version": "https://registry.npmjs.org/babel-cli/-/babel-cli-6.24.1.tgz",
-      "integrity": "sha1-IHzXBbumFImy6kG1MSNBz2rKIoM=",
-      "dev": true
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-cli/-/babel-cli-6.26.0.tgz",
+      "integrity": "sha1-UCq1SHTX24itALiHoGODzgPQAvE=",
+      "dev": true,
+      "requires": {
+        "babel-core": "6.26.0",
+        "babel-polyfill": "6.26.0",
+        "babel-register": "6.26.0",
+        "babel-runtime": "6.26.0",
+        "chokidar": "1.7.0",
+        "commander": "2.11.0",
+        "convert-source-map": "1.5.0",
+        "fs-readdir-recursive": "1.1.0",
+        "glob": "7.1.2",
+        "lodash": "4.17.4",
+        "output-file-sync": "1.1.2",
+        "path-is-absolute": "1.0.1",
+        "slash": "1.0.0",
+        "source-map": "0.5.7",
+        "v8flags": "2.1.1"
+      },
+      "dependencies": {
+        "commander": {
+          "version": "2.11.0",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.11.0.tgz",
+          "integrity": "sha512-b0553uYA5YAEGgyYIGYROzKQ7X5RAqedkfjiZxwi0kL1g3bOaBNNZfYkzt/CL0umgD5wc9Jec2FbB98CjkMRvQ==",
+          "dev": true
+        },
+        "glob": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.2.tgz",
+          "integrity": "sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "1.0.0",
+            "inflight": "1.0.6",
+            "inherits": "2.0.3",
+            "minimatch": "3.0.4",
+            "once": "1.4.0",
+            "path-is-absolute": "1.0.1"
+          }
+        },
+        "minimatch": {
+          "version": "3.0.4",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+          "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+          "dev": true,
+          "requires": {
+            "brace-expansion": "1.1.8"
+          }
+        }
+      }
     },
     "babel-code-frame": {
-      "version": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.22.0.tgz",
-      "integrity": "sha1-AnYgvuVnqIwyVhV05/0IAdMxGOQ=",
-      "dev": true
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
+      "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
+      "dev": true,
+      "requires": {
+        "chalk": "1.1.3",
+        "esutils": "2.0.2",
+        "js-tokens": "3.0.2"
+      }
     },
     "babel-core": {
-      "version": "https://registry.npmjs.org/babel-core/-/babel-core-6.25.0.tgz",
-      "integrity": "sha1-fdQrBGPHQunVKW3rPsZ6kyLa1yk=",
-      "dev": true
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.26.0.tgz",
+      "integrity": "sha1-rzL3izGm/O8RnIew/Y2XU/A6C7g=",
+      "dev": true,
+      "requires": {
+        "babel-code-frame": "6.26.0",
+        "babel-generator": "6.26.0",
+        "babel-helpers": "6.24.1",
+        "babel-messages": "6.23.0",
+        "babel-register": "6.26.0",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0",
+        "babylon": "6.18.0",
+        "convert-source-map": "1.5.0",
+        "debug": "2.6.9",
+        "json5": "0.5.1",
+        "lodash": "4.17.4",
+        "minimatch": "3.0.4",
+        "path-is-absolute": "1.0.1",
+        "private": "0.1.8",
+        "slash": "1.0.0",
+        "source-map": "0.5.7"
+      },
+      "dependencies": {
+        "minimatch": {
+          "version": "3.0.4",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+          "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+          "dev": true,
+          "requires": {
+            "brace-expansion": "1.1.8"
+          }
+        }
+      }
     },
     "babel-generator": {
-      "version": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.25.0.tgz",
-      "integrity": "sha1-M6GvcNXyiQrrRlpKd5PB32qeqfw=",
-      "dev": true
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.0.tgz",
+      "integrity": "sha1-rBriAHC3n248odMmlhMFN3TyDcU=",
+      "dev": true,
+      "requires": {
+        "babel-messages": "6.23.0",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "detect-indent": "4.0.0",
+        "jsesc": "1.3.0",
+        "lodash": "4.17.4",
+        "source-map": "0.5.7",
+        "trim-right": "1.0.1"
+      }
     },
     "babel-helper-call-delegate": {
-      "version": "https://registry.npmjs.org/babel-helper-call-delegate/-/babel-helper-call-delegate-6.24.1.tgz",
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helper-call-delegate/-/babel-helper-call-delegate-6.24.1.tgz",
       "integrity": "sha1-7Oaqzdx25Bw0YfiL/Fdb0Nqi340=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "babel-helper-hoist-variables": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
+      }
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     "babel-helper-define-map": {
-      "version": "https://registry.npmjs.org/babel-helper-define-map/-/babel-helper-define-map-6.24.1.tgz",
-      "integrity": "sha1-epdH8ljYlH0y1RX2qhx70CIEoIA=",
-      "dev": true
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-helper-define-map/-/babel-helper-define-map-6.26.0.tgz",
+      "integrity": "sha1-pfVtq0GiX5fstJjH66ypgZ+Vvl8=",
+      "dev": true,
+      "requires": {
+        "babel-helper-function-name": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "lodash": "4.17.4"
+      }
     },
     "babel-helper-function-name": {
-      "version": "https://registry.npmjs.org/babel-helper-function-name/-/babel-helper-function-name-6.24.1.tgz",
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helper-function-name/-/babel-helper-function-name-6.24.1.tgz",
       "integrity": "sha1-00dbjAPtmCQqJbSDUasYOZ01gKk=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "babel-helper-get-function-arity": "6.24.1",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
+        "babel-types": "6.26.0"
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     "babel-helper-get-function-arity": {
-      "version": "https://registry.npmjs.org/babel-helper-get-function-arity/-/babel-helper-get-function-arity-6.24.1.tgz",
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helper-get-function-arity/-/babel-helper-get-function-arity-6.24.1.tgz",
       "integrity": "sha1-j3eCqpNAfEHTqlCQj4mwMbG2hT0=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
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     "babel-helper-hoist-variables": {
-      "version": "https://registry.npmjs.org/babel-helper-hoist-variables/-/babel-helper-hoist-variables-6.24.1.tgz",
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helper-hoist-variables/-/babel-helper-hoist-variables-6.24.1.tgz",
       "integrity": "sha1-HssnaJydJVE+rbyZFKc/VAi+enY=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "babel-runtime": "6.26.0",
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     "babel-helper-optimise-call-expression": {
-      "version": "https://registry.npmjs.org/babel-helper-optimise-call-expression/-/babel-helper-optimise-call-expression-6.24.1.tgz",
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helper-optimise-call-expression/-/babel-helper-optimise-call-expression-6.24.1.tgz",
       "integrity": "sha1-96E0J7qfc/j0+pk8VKl4gtEkQlc=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0"
+      }
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     "babel-helper-regex": {
-      "version": "https://registry.npmjs.org/babel-helper-regex/-/babel-helper-regex-6.24.1.tgz",
-      "integrity": "sha1-024i+rEAjXnYhkjjIRaGgShFbOg=",
-      "dev": true
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-helper-regex/-/babel-helper-regex-6.26.0.tgz",
+      "integrity": "sha1-MlxZ+QL4LyS3T6zu0DY5VPZJXnI=",
+      "dev": true,
+      "requires": {
+        "babel-runtime": "6.26.0",
+        "babel-types": "6.26.0",
+        "lodash": "4.17.4"
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     "babel-helper-replace-supers": {
-      "version": "https://registry.npmjs.org/babel-helper-replace-supers/-/babel-helper-replace-supers-6.24.1.tgz",
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helper-replace-supers/-/babel-helper-replace-supers-6.24.1.tgz",
       "integrity": "sha1-v22/5Dk40XNpohPKiov3S2qQqxo=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "babel-helper-optimise-call-expression": "6.24.1",
+        "babel-messages": "6.23.0",
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0",
+        "babel-traverse": "6.26.0",
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+      }
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     "babel-helpers": {
-      "version": "https://registry.npmjs.org/babel-helpers/-/babel-helpers-6.24.1.tgz",
+      "version": "6.24.1",
+      "resolved": "https://registry.npmjs.org/babel-helpers/-/babel-helpers-6.24.1.tgz",
       "integrity": "sha1-NHHenK7DiOXIUOWX5Yom3fN2ArI=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "babel-runtime": "6.26.0",
+        "babel-template": "6.26.0"
+      }
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     "babel-messages": {
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+        "media-typer": "0.3.0",
+        "mime-types": "2.1.17"
+      }
     },
     "ultron": {
       "version": "1.1.0",
@@ -2473,31 +3797,57 @@
       "integrity": "sha1-sHoualQagV/Go0zNRTO67DB8qGQ="
     },
     "unbzip2-stream": {
-      "version": "https://registry.npmjs.org/unbzip2-stream/-/unbzip2-stream-1.2.4.tgz",
-      "integrity": "sha1-jITITVtMwo/B+fV3IDu9PLhgoWo=",
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/unbzip2-stream/-/unbzip2-stream-1.2.5.tgz",
+      "integrity": "sha512-izD3jxT8xkzwtXRUZjtmRwKnZoeECrfZ8ra/ketwOcusbZEp4mjULMnJOCfTDZBgGQAAY1AJ/IgxcwkavcX9Og==",
+      "requires": {
+        "buffer": "3.6.0",
+        "through": "2.3.8"
+      },
       "dependencies": {
         "base64-js": {
-          "version": "https://registry.npmjs.org/base64-js/-/base64-js-0.0.8.tgz",
+          "version": "0.0.8",
+          "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-0.0.8.tgz",
           "integrity": "sha1-EQHpVE9KdrG8OybUUsqW16NeeXg="
         },
         "buffer": {
-          "version": "https://registry.npmjs.org/buffer/-/buffer-3.6.0.tgz",
-          "integrity": "sha1-pyyTb3e5a/UvX357RnGAYoVR3vs="
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/buffer/-/buffer-3.6.0.tgz",
+          "integrity": "sha1-pyyTb3e5a/UvX357RnGAYoVR3vs=",
+          "requires": {
+            "base64-js": "0.0.8",
+            "ieee754": "1.1.8",
+            "isarray": "1.0.0"
+          }
         }
       }
     },
+    "universalify": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.1.tgz",
+      "integrity": "sha1-+nG63UQ3r0wUiEHjs7Fl+enlkLc="
+    },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
     },
+    "unzip-response": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/unzip-response/-/unzip-response-1.0.2.tgz",
+      "integrity": "sha1-uYTwh3/AqJwsdzzB73tbIytbBv4="
+    },
     "url-parse-lax": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-1.0.0.tgz",
-      "integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM="
+      "integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
+      "requires": {
+        "prepend-http": "1.0.4"
+      }
     },
     "url-set-query": {
-      "version": "https://registry.npmjs.org/url-set-query/-/url-set-query-1.0.0.tgz",
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/url-set-query/-/url-set-query-1.0.0.tgz",
       "integrity": "sha1-AW6M/Xwg7gXK/neV6JK9BwL6ozk="
     },
     "url-to-options": {
@@ -2506,18 +3856,20 @@
       "integrity": "sha1-FQWgOiiaSMvXpDTvuu7FBV9WM6k="
     },
     "user-home": {
-      "version": "https://registry.npmjs.org/user-home/-/user-home-1.1.1.tgz",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/user-home/-/user-home-1.1.1.tgz",
       "integrity": "sha1-K1viOjK2Onyd640PKNSFcko98ZA=",
       "dev": true
     },
     "util-deprecate": {
-      "version": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
     "utils-merge": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.0.tgz",
-      "integrity": "sha1-ApT7kiu5N1FTVBxPcJYjHyh8ivg="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
     },
     "uuid": {
       "version": "3.1.0",
@@ -2525,72 +3877,97 @@
       "integrity": "sha512-DIWtzUkw04M4k3bf1IcpS2tngXEL26YUD2M0tMDUpnUrz2hgzUBlD55a4FjdLGPvfHxS6uluGWvaVEqgBcVa+g=="
     },
     "v8flags": {
-      "version": "https://registry.npmjs.org/v8flags/-/v8flags-2.1.1.tgz",
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-2.1.1.tgz",
       "integrity": "sha1-qrGh+jDUX4jdMhFIh1rALAtV5bQ=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "user-home": "1.1.1"
+      }
     },
     "vary": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.1.tgz",
-      "integrity": "sha1-Z1Neu2lMHVIldFeYRmUyP1h+jTc="
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
     },
     "verror": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
-      "dependencies": {
-        "assert-plus": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-          "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
-        }
+      "requires": {
+        "assert-plus": "1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "1.3.0"
       }
     },
     "wrappy": {
-      "version": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
     "ws": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-3.1.0.tgz",
-      "integrity": "sha512-TU4/qKFlyQFqNITNWiqPCUY9GqlAhEotlzfcZcve6VT1YEngQl1dDMqwQQS3eMYruJ5r/UD3lcsWib6iVMDGDw==",
-      "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=="
-        }
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.1.tgz",
+      "integrity": "sha512-8A/uRMnQy8KCQsmep1m7Bk+z/+LIkeF7w+TDMLtX1iZm5Hq9HsUDmgFGaW1ACW5Cj0b2Qo7wCvRhYN2ErUVp/A==",
+      "requires": {
+        "async-limiter": "1.0.0",
+        "safe-buffer": "5.1.1",
+        "ultron": "1.1.0"
       }
     },
     "xhr": {
-      "version": "https://registry.npmjs.org/xhr/-/xhr-2.4.0.tgz",
-      "integrity": "sha1-4W5mpF+GmGHu76tBbV7/ci3ECZM="
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.4.0.tgz",
+      "integrity": "sha1-4W5mpF+GmGHu76tBbV7/ci3ECZM=",
+      "requires": {
+        "global": "4.3.2",
+        "is-function": "1.0.1",
+        "parse-headers": "2.0.1",
+        "xtend": "4.0.1"
+      }
     },
     "xhr-request": {
-      "version": "https://registry.npmjs.org/xhr-request/-/xhr-request-1.0.1.tgz",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/xhr-request/-/xhr-request-1.0.1.tgz",
       "integrity": "sha1-g/CKSyC+7Geowcco6BAvTJ7svdo=",
+      "requires": {
+        "buffer-to-arraybuffer": "0.0.2",
+        "object-assign": "3.0.0",
+        "query-string": "2.4.2",
+        "simple-get": "1.4.3",
+        "timed-out": "2.0.0",
+        "url-set-query": "1.0.0",
+        "xhr": "2.4.0"
+      },
       "dependencies": {
         "object-assign": {
-          "version": "https://registry.npmjs.org/object-assign/-/object-assign-3.0.0.tgz",
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-3.0.0.tgz",
           "integrity": "sha1-m+3VygiXlJvKR+f/QIBi1Un1h/I="
-        },
-        "timed-out": {
-          "version": "https://registry.npmjs.org/timed-out/-/timed-out-2.0.0.tgz",
-          "integrity": "sha1-84sK6B03R9YoAB9B2vxlKs5nHAo="
         }
       }
     },
     "xhr-request-promise": {
-      "version": "https://registry.npmjs.org/xhr-request-promise/-/xhr-request-promise-0.1.2.tgz",
-      "integrity": "sha1-NDxE0e53JrhkgGloLQ+EDIO0Jh0="
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/xhr-request-promise/-/xhr-request-promise-0.1.2.tgz",
+      "integrity": "sha1-NDxE0e53JrhkgGloLQ+EDIO0Jh0=",
+      "requires": {
+        "xhr-request": "1.0.1"
+      }
     },
     "xtend": {
-      "version": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
       "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
     },
     "yauzl": {
-      "version": "https://registry.npmjs.org/yauzl/-/yauzl-2.8.0.tgz",
-      "integrity": "sha1-eUUK/yKyqcWkHvVOAtuQfM+/nuI="
+      "version": "2.9.1",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.9.1.tgz",
+      "integrity": "sha1-qBmB6nCleUYTOIPwKcWCGok1mn8=",
+      "requires": {
+        "buffer-crc32": "0.2.13",
+        "fd-slicer": "1.0.1"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index c5540ce..2e6a863 100644
--- a/package.json
+++ b/package.json
@@ -22,8 +22,7 @@
     "buffer": "^5.0.5",
     "decompress": "^4.0.0",
     "eth-lib": "^0.1.26",
-    "fs-extra": "^2.1.2",
-    "fs-promise": "^2.0.0",
+    "fs-extra": "^4.0.2",
     "got": "^7.1.0",
     "mime-types": "^2.1.16",
     "mkdirp-promise": "^5.0.1",
diff --git a/scripts/prepareArchives.js b/scripts/prepareArchives.js
index 5d8202a..68cecbf 100644
--- a/scripts/prepareArchives.js
+++ b/scripts/prepareArchives.js
@@ -2,7 +2,6 @@ const Q = require("bluebird");
 const decompress = require("decompress");
 const files = require("./../src/files.js");
 const fs = require("fs-extra");
-const fsp = require("fs-promise");
 const got = require("got");
 const path = require("path");
 const targz = require("tar.gz");
@@ -11,7 +10,7 @@ const xml = require("xml2js");
 // Downloads list of Geth releases
 console.log("Retrieving list of Geth releases from https://gethstore.blob.core.windows.net.");
 got("https://gethstore.blob.core.windows.net/builds?restype=container&comp=list")
-  
+
   // Parses XML
   .then((res) => new Q((resolve, reject) => {
     console.log("Parsing XML.");
@@ -76,9 +75,9 @@ got("https://gethstore.blob.core.windows.net/builds?restype=container&comp=list"
         return files.download(bin.gethArchiveUrl)(bin.gethArchivePath)
           .then(path => (console.log("Downloaded " + path + "."), path))
           .then(path => decompress(path, "tmp_downloads"))
-          .then(() => !fs.existsSync(bin.swarmBinaryDir) && fsp.mkdir(bin.swarmBinaryDir))
+          .then(() => !fs.existsSync(bin.swarmBinaryDir) && fs.mkdir(bin.swarmBinaryDir))
           .then(() => files.search(/swarm(.exe|)$/)(bin.gethFilesPath))
-          .then(([swarmPath]) => fsp.rename(swarmPath, bin.swarmBinaryPath))
+          .then(([swarmPath]) => fs.rename(swarmPath, bin.swarmBinaryPath))
           .then(() => files.hash("md5")(bin.swarmBinaryPath))
           .then(binaryMD5 => archive.binaryMD5 = binaryMD5)
           .then(() => targz().compress(bin.swarmBinaryDir, bin.swarmArchivePath))