diff --git a/index.js b/index.js
index 3ce88ff..83a66e2 100755
--- a/index.js
+++ b/index.js
@@ -110,14 +110,16 @@ function authenticate(callback) {
         accessToken: result.getAccessToken().getJwtToken()
       });
     },
-    onFailure: function(err) {
+    onFailure: function(err) {``
       console.log(err.message ? err.message : err);
     },
     newPasswordRequired: function() {
       console.log("Given user needs to set a new password");
     },
-    mfaRequired: function() {
-      console.log("MFA is not currently supported");
+    mfaRequired: function(authenticationDetails) {
+      promptConfirmationCode(function(confirmationCode, authenticator){
+        cognitoUser.sendMFACode(confirmationCode, authenticator);
+      }, this);
     },
     customChallenge: function() {
       console.log("Custom challenge is not currently supported");
@@ -195,6 +197,21 @@ function makeRequest(userTokens) {
     });
 }
 
+function promptConfirmationCode(callback, authenticator){
+  var readline = require('readline');
+
+  var rl = readline.createInterface({
+    input: process.stdin,
+    output: process.stdout
+  });
+
+  rl.question('Confirmation code (see SMS text message):', function(answer){
+    rl.close();
+    callback(answer, authenticator);
+  });
+
+}
+
 authenticate(function(tokens) {
   getCredentials(tokens, makeRequest);
 });
diff --git a/package-lock.json b/package-lock.json
index 52b6814..16103c1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "resolved": "https://registry.npmjs.org/amazon-cognito-identity-js/-/amazon-cognito-identity-js-1.19.0.tgz",
       "integrity": "sha1-xPeot7/usCPZYh9K80Bz3GJ5Al0=",
       "requires": {
-        "aws-sdk": "2.80.0"
+        "aws-sdk": "^2.6.0"
       }
     },
     "ansi-regex": {
@@ -22,27 +22,27 @@
       "resolved": "https://registry.npmjs.org/aws-api-gateway-client/-/aws-api-gateway-client-0.2.7.tgz",
       "integrity": "sha1-A6mDutLT7dp5OQs5mLVd+FyQt80=",
       "requires": {
-        "axios": "0.16.2",
-        "axios-retry": "1.3.1",
-        "crypto-js": "3.1.9-1",
-        "url": "0.11.0",
-        "url-template": "2.0.8"
+        "axios": "^0.16.1",
+        "axios-retry": "^1.2.0",
+        "crypto-js": "^3.1.9-1",
+        "url": "^0.11.0",
+        "url-template": "^2.0.8"
       }
     },
     "aws-sdk": {
-      "version": "2.80.0",
-      "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.80.0.tgz",
-      "integrity": "sha1-Yc7XR+uYFglIOuxT6NZU08ydFDU=",
+      "version": "2.421.0",
+      "resolved": "https://registry.npmjs.org/aws-sdk/-/aws-sdk-2.421.0.tgz",
+      "integrity": "sha512-N0vY++NJc0MV96pu4vcnJIe8MXNKgcNLxlRPDALlIbaYHSC+btJSAdXpC5+4uFFF30uWCaIM1WiX8O/9Obg5oA==",
       "requires": {
         "buffer": "4.9.1",
-        "crypto-browserify": "1.0.9",
+        "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": "3.0.1",
-        "xml2js": "0.4.17",
-        "xmlbuilder": "4.2.1"
+        "uuid": "3.3.2",
+        "xml2js": "0.4.19"
       },
       "dependencies": {
         "url": {
@@ -61,8 +61,8 @@
       "resolved": "https://registry.npmjs.org/axios/-/axios-0.16.2.tgz",
       "integrity": "sha1-uk+S8XFn37q0CYN4VFS5rBScPG0=",
       "requires": {
-        "follow-redirects": "1.2.4",
-        "is-buffer": "1.1.5"
+        "follow-redirects": "^1.2.3",
+        "is-buffer": "^1.1.5"
       }
     },
     "axios-retry": {
@@ -70,22 +70,22 @@
       "resolved": "https://registry.npmjs.org/axios-retry/-/axios-retry-1.3.1.tgz",
       "integrity": "sha1-JeBWzUBisn39J8qqSmeQvawmQFM=",
       "requires": {
-        "is-retry-allowed": "1.1.0"
+        "is-retry-allowed": "^1.1.0"
       }
     },
     "base64-js": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.2.1.tgz",
-      "integrity": "sha512-dwVUVIXsBZXwTuwnXI9RK8sBmgq09NDHzyR9SAph9eqk76gKK2JSQmZARC2zRC81JC2QTtxD0ARU5qTS25gIGw=="
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
+      "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
     },
     "buffer": {
       "version": "4.9.1",
       "resolved": "https://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz",
       "integrity": "sha1-bRu2AbB6TvztlwlBMgkwJ8lbwpg=",
       "requires": {
-        "base64-js": "1.2.1",
-        "ieee754": "1.1.8",
-        "isarray": "1.0.0"
+        "base64-js": "^1.0.2",
+        "ieee754": "^1.1.4",
+        "isarray": "^1.0.0"
       }
     },
     "builtin-modules": {
@@ -103,9 +103,9 @@
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz",
       "integrity": "sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=",
       "requires": {
-        "string-width": "1.0.2",
-        "strip-ansi": "3.0.1",
-        "wrap-ansi": "2.1.0"
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1",
+        "wrap-ansi": "^2.0.0"
       },
       "dependencies": {
         "string-width": {
@@ -113,9 +113,9 @@
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
           "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
           "requires": {
-            "code-point-at": "1.1.0",
-            "is-fullwidth-code-point": "1.0.0",
-            "strip-ansi": "3.0.1"
+            "code-point-at": "^1.0.0",
+            "is-fullwidth-code-point": "^1.0.0",
+            "strip-ansi": "^3.0.0"
           }
         }
       }
@@ -130,24 +130,19 @@
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-4.0.2.tgz",
       "integrity": "sha1-e5JHYhwjrf3ThWAEqCPL45dCTUE=",
       "requires": {
-        "lru-cache": "4.1.1",
-        "which": "1.2.14"
+        "lru-cache": "^4.0.1",
+        "which": "^1.2.9"
       }
     },
-    "crypto-browserify": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/crypto-browserify/-/crypto-browserify-1.0.9.tgz",
-      "integrity": "sha1-zFRJaF37hesRyYKKzHy4erW7/MA="
-    },
     "crypto-js": {
       "version": "3.1.9-1",
       "resolved": "https://registry.npmjs.org/crypto-js/-/crypto-js-3.1.9-1.tgz",
       "integrity": "sha1-/aGedh/Ad+Af+/3G6f38WeiAbNg="
     },
     "debug": {
-      "version": "2.6.8",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.8.tgz",
-      "integrity": "sha1-5zFTHKLt4n0YgiJCfaF4IdaP9Pw=",
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
       "requires": {
         "ms": "2.0.0"
       }
@@ -162,21 +157,26 @@
       "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.1.tgz",
       "integrity": "sha1-+FWobOYa3E6GIcPNoh56dhLDqNw=",
       "requires": {
-        "is-arrayish": "0.2.1"
+        "is-arrayish": "^0.2.1"
       }
     },
+    "events": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/events/-/events-1.1.1.tgz",
+      "integrity": "sha1-nr23Y1rQmccNzEwqH1AEKI6L2SQ="
+    },
     "execa": {
       "version": "0.5.1",
       "resolved": "https://registry.npmjs.org/execa/-/execa-0.5.1.tgz",
       "integrity": "sha1-3j+4XLjW6RyFvLzrFkWBeFy1ezY=",
       "requires": {
-        "cross-spawn": "4.0.2",
-        "get-stream": "2.3.1",
-        "is-stream": "1.1.0",
-        "npm-run-path": "2.0.2",
-        "p-finally": "1.0.0",
-        "signal-exit": "3.0.2",
-        "strip-eof": "1.0.0"
+        "cross-spawn": "^4.0.0",
+        "get-stream": "^2.2.0",
+        "is-stream": "^1.1.0",
+        "npm-run-path": "^2.0.0",
+        "p-finally": "^1.0.0",
+        "signal-exit": "^3.0.0",
+        "strip-eof": "^1.0.0"
       }
     },
     "find-up": {
@@ -184,7 +184,7 @@
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
       "integrity": "sha1-RdG35QbHF93UgndaK3eSCjwMV6c=",
       "requires": {
-        "locate-path": "2.0.0"
+        "locate-path": "^2.0.0"
       }
     },
     "follow-redirects": {
@@ -192,7 +192,7 @@
       "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.2.4.tgz",
       "integrity": "sha512-Suw6KewLV2hReSyEOeql+UUkBVyiBm3ok1VPrVFRZnQInWpdoZbbiG5i8aJVSjTr0yQ4Ava0Sh6/joCg1Brdqw==",
       "requires": {
-        "debug": "2.6.8"
+        "debug": "^2.4.5"
       }
     },
     "get-caller-file": {
@@ -205,8 +205,8 @@
       "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-2.3.1.tgz",
       "integrity": "sha1-Xzj5PzRgCWZu4BUKBUFn+Rvdld4=",
       "requires": {
-        "object-assign": "4.1.1",
-        "pinkie-promise": "2.0.1"
+        "object-assign": "^4.0.1",
+        "pinkie-promise": "^2.0.0"
       }
     },
     "graceful-fs": {
@@ -244,7 +244,7 @@
       "resolved": "https://registry.npmjs.org/is-builtin-module/-/is-builtin-module-1.0.0.tgz",
       "integrity": "sha1-VAVy0096wxGfj3bDDLwbHgN6/74=",
       "requires": {
-        "builtin-modules": "1.1.1"
+        "builtin-modules": "^1.0.0"
       }
     },
     "is-fullwidth-code-point": {
@@ -252,7 +252,7 @@
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
       "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
       "requires": {
-        "number-is-nan": "1.0.1"
+        "number-is-nan": "^1.0.0"
       }
     },
     "is-retry-allowed": {
@@ -285,7 +285,7 @@
       "resolved": "https://registry.npmjs.org/lcid/-/lcid-1.0.0.tgz",
       "integrity": "sha1-MIrMr6C8SDo4Z7S28rlQYlHRuDU=",
       "requires": {
-        "invert-kv": "1.0.0"
+        "invert-kv": "^1.0.0"
       }
     },
     "load-json-file": {
@@ -293,10 +293,10 @@
       "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
       "integrity": "sha1-eUfkIUmvgNaWy/eXvKq8/h/inKg=",
       "requires": {
-        "graceful-fs": "4.1.11",
-        "parse-json": "2.2.0",
-        "pify": "2.3.0",
-        "strip-bom": "3.0.0"
+        "graceful-fs": "^4.1.2",
+        "parse-json": "^2.2.0",
+        "pify": "^2.0.0",
+        "strip-bom": "^3.0.0"
       }
     },
     "locate-path": {
@@ -304,22 +304,17 @@
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-2.0.0.tgz",
       "integrity": "sha1-K1aLJl7slExtnA3pw9u7ygNUzY4=",
       "requires": {
-        "p-locate": "2.0.0",
-        "path-exists": "3.0.0"
+        "p-locate": "^2.0.0",
+        "path-exists": "^3.0.0"
       }
     },
-    "lodash": {
-      "version": "4.17.4",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.4.tgz",
-      "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4="
-    },
     "lru-cache": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.1.tgz",
       "integrity": "sha512-q4spe4KTfsAS1SUHLO0wz8Qiyf1+vMIAgpRYioFYDMNqKfHQbg+AVDH3i4fvpl71/P1L0dBl+fQi+P37UYf0ew==",
       "requires": {
-        "pseudomap": "1.0.2",
-        "yallist": "2.1.2"
+        "pseudomap": "^1.0.2",
+        "yallist": "^2.1.2"
       }
     },
     "mem": {
@@ -327,7 +322,7 @@
       "resolved": "https://registry.npmjs.org/mem/-/mem-1.1.0.tgz",
       "integrity": "sha1-Xt1StIXKHZAP5kiVUFOZoN+kX3Y=",
       "requires": {
-        "mimic-fn": "1.1.0"
+        "mimic-fn": "^1.0.0"
       }
     },
     "mimic-fn": {
@@ -345,10 +340,10 @@
       "resolved": "https://registry.npmjs.org/normalize-package-data/-/normalize-package-data-2.4.0.tgz",
       "integrity": "sha512-9jjUFbTPfEy3R/ad/2oNbKtW9Hgovl5O1FvFWKkKblNXoN/Oou6+9+KKohPK13Yc3/TyunyWhJp6gvRNR/PPAw==",
       "requires": {
-        "hosted-git-info": "2.5.0",
-        "is-builtin-module": "1.0.0",
-        "semver": "5.3.0",
-        "validate-npm-package-license": "3.0.1"
+        "hosted-git-info": "^2.1.4",
+        "is-builtin-module": "^1.0.0",
+        "semver": "2 || 3 || 4 || 5",
+        "validate-npm-package-license": "^3.0.1"
       }
     },
     "npm-run-path": {
@@ -356,7 +351,7 @@
       "resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-2.0.2.tgz",
       "integrity": "sha1-NakjLfo11wZ7TLLd8jV7GHFTbF8=",
       "requires": {
-        "path-key": "2.0.1"
+        "path-key": "^2.0.0"
       }
     },
     "number-is-nan": {
@@ -374,9 +369,9 @@
       "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-2.0.0.tgz",
       "integrity": "sha1-FZGN7VEFIrge565aMJ1U9jn8OaQ=",
       "requires": {
-        "execa": "0.5.1",
-        "lcid": "1.0.0",
-        "mem": "1.1.0"
+        "execa": "^0.5.0",
+        "lcid": "^1.0.0",
+        "mem": "^1.1.0"
       }
     },
     "p-finally": {
@@ -394,7 +389,7 @@
       "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-2.0.0.tgz",
       "integrity": "sha1-IKAQOyIqcMj9OcwuWAaA893l7EM=",
       "requires": {
-        "p-limit": "1.1.0"
+        "p-limit": "^1.1.0"
       }
     },
     "parse-json": {
@@ -402,7 +397,7 @@
       "resolved": "https://registry.npmjs.org/parse-json/-/parse-json-2.2.0.tgz",
       "integrity": "sha1-9ID0BDTvgHQfhGkJn43qGPVaTck=",
       "requires": {
-        "error-ex": "1.3.1"
+        "error-ex": "^1.2.0"
       }
     },
     "path-exists": {
@@ -420,7 +415,7 @@
       "resolved": "https://registry.npmjs.org/path-type/-/path-type-2.0.0.tgz",
       "integrity": "sha1-8BLMuEFbcJb8LaoQVMPXI4lZTHM=",
       "requires": {
-        "pify": "2.3.0"
+        "pify": "^2.0.0"
       }
     },
     "pify": {
@@ -438,7 +433,7 @@
       "resolved": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz",
       "integrity": "sha1-ITXW36ejWMBprJsXh3YogihFD/o=",
       "requires": {
-        "pinkie": "2.0.4"
+        "pinkie": "^2.0.0"
       }
     },
     "pseudomap": {
@@ -461,9 +456,9 @@
       "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-2.0.0.tgz",
       "integrity": "sha1-jvHAYjxqbbDcZxPEv6xGMysjaPg=",
       "requires": {
-        "load-json-file": "2.0.0",
-        "normalize-package-data": "2.4.0",
-        "path-type": "2.0.0"
+        "load-json-file": "^2.0.0",
+        "normalize-package-data": "^2.3.2",
+        "path-type": "^2.0.0"
       }
     },
     "read-pkg-up": {
@@ -471,8 +466,8 @@
       "resolved": "https://registry.npmjs.org/read-pkg-up/-/read-pkg-up-2.0.0.tgz",
       "integrity": "sha1-a3KoBImE4MQeeVEP1en6mbO1Sb4=",
       "requires": {
-        "find-up": "2.1.0",
-        "read-pkg": "2.0.0"
+        "find-up": "^2.0.0",
+        "read-pkg": "^2.0.0"
       }
     },
     "require-directory": {
@@ -510,7 +505,7 @@
       "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-1.0.2.tgz",
       "integrity": "sha1-SzBz2TP/UfORLwOsVRlJikFQ20A=",
       "requires": {
-        "spdx-license-ids": "1.2.2"
+        "spdx-license-ids": "^1.0.2"
       }
     },
     "spdx-expression-parse": {
@@ -528,8 +523,8 @@
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.0.tgz",
       "integrity": "sha1-AwZkVh/BRslCPsfZeP4kV0N/5tA=",
       "requires": {
-        "is-fullwidth-code-point": "2.0.0",
-        "strip-ansi": "4.0.0"
+        "is-fullwidth-code-point": "^2.0.0",
+        "strip-ansi": "^4.0.0"
       },
       "dependencies": {
         "ansi-regex": {
@@ -547,7 +542,7 @@
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
           "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
           "requires": {
-            "ansi-regex": "3.0.0"
+            "ansi-regex": "^3.0.0"
           }
         }
       }
@@ -557,7 +552,7 @@
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
       "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
       "requires": {
-        "ansi-regex": "2.1.1"
+        "ansi-regex": "^2.0.0"
       }
     },
     "strip-bom": {
@@ -585,17 +580,17 @@
       "integrity": "sha1-/FZaPMy/93MMd19WQflVV5FDnyE="
     },
     "uuid": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.0.1.tgz",
-      "integrity": "sha1-ZUS7ot/ajBzxfmKaOjBeK7H+5sE="
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
+      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
     },
     "validate-npm-package-license": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz",
       "integrity": "sha1-KAS6vnEq0zeUWaz74kdGqywwP7w=",
       "requires": {
-        "spdx-correct": "1.0.2",
-        "spdx-expression-parse": "1.0.4"
+        "spdx-correct": "~1.0.0",
+        "spdx-expression-parse": "~1.0.0"
       }
     },
     "which": {
@@ -603,7 +598,7 @@
       "resolved": "https://registry.npmjs.org/which/-/which-1.2.14.tgz",
       "integrity": "sha1-mofEN48D6CfOyvGs31bHNsAcFOU=",
       "requires": {
-        "isexe": "2.0.0"
+        "isexe": "^2.0.0"
       }
     },
     "which-module": {
@@ -621,8 +616,8 @@
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "requires": {
-        "string-width": "1.0.2",
-        "strip-ansi": "3.0.1"
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1"
       },
       "dependencies": {
         "string-width": {
@@ -630,29 +625,26 @@
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
           "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
           "requires": {
-            "code-point-at": "1.1.0",
-            "is-fullwidth-code-point": "1.0.0",
-            "strip-ansi": "3.0.1"
+            "code-point-at": "^1.0.0",
+            "is-fullwidth-code-point": "^1.0.0",
+            "strip-ansi": "^3.0.0"
           }
         }
       }
     },
     "xml2js": {
-      "version": "0.4.17",
-      "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.17.tgz",
-      "integrity": "sha1-F76T6q4/O3eTWceVtBlwWogX6Gg=",
+      "version": "0.4.19",
+      "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.19.tgz",
+      "integrity": "sha512-esZnJZJOiJR9wWKMyuvSE1y6Dq5LCuJanqhxslH2bxM6duahNZ+HMpCLhBQGZkbX6xRf8x1Y2eJlgt2q3qo49Q==",
       "requires": {
-        "sax": "1.2.1",
-        "xmlbuilder": "4.2.1"
+        "sax": ">=0.6.0",
+        "xmlbuilder": "~9.0.1"
       }
     },
     "xmlbuilder": {
-      "version": "4.2.1",
-      "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-4.2.1.tgz",
-      "integrity": "sha1-qlijBBoGb5DqoWwvU4n/GfP0YaU=",
-      "requires": {
-        "lodash": "4.17.4"
-      }
+      "version": "9.0.7",
+      "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-9.0.7.tgz",
+      "integrity": "sha1-Ey7mPS7FVlxVfiD0wi35rKaGsQ0="
     },
     "y18n": {
       "version": "3.2.1",
@@ -669,19 +661,19 @@
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-8.0.2.tgz",
       "integrity": "sha1-YpmpBVsc78lp/355wdkY3Osiw2A=",
       "requires": {
-        "camelcase": "4.1.0",
-        "cliui": "3.2.0",
-        "decamelize": "1.2.0",
-        "get-caller-file": "1.0.2",
-        "os-locale": "2.0.0",
-        "read-pkg-up": "2.0.0",
-        "require-directory": "2.1.1",
-        "require-main-filename": "1.0.1",
-        "set-blocking": "2.0.0",
-        "string-width": "2.1.0",
-        "which-module": "2.0.0",
-        "y18n": "3.2.1",
-        "yargs-parser": "7.0.0"
+        "camelcase": "^4.1.0",
+        "cliui": "^3.2.0",
+        "decamelize": "^1.1.1",
+        "get-caller-file": "^1.0.1",
+        "os-locale": "^2.0.0",
+        "read-pkg-up": "^2.0.0",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^1.0.1",
+        "set-blocking": "^2.0.0",
+        "string-width": "^2.0.0",
+        "which-module": "^2.0.0",
+        "y18n": "^3.2.1",
+        "yargs-parser": "^7.0.0"
       }
     },
     "yargs-parser": {
@@ -689,7 +681,7 @@
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-7.0.0.tgz",
       "integrity": "sha1-jQrELxbqVd69MyyvTEA4s+P139k=",
       "requires": {
-        "camelcase": "4.1.0"
+        "camelcase": "^4.1.0"
       }
     }
   }
diff --git a/package.json b/package.json
index 9d8c002..f22a17e 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   "dependencies": {
     "amazon-cognito-identity-js": "^1.19.0",
     "aws-api-gateway-client": "^0.2.7",
-    "aws-sdk": "^2.80.0",
+    "aws-sdk": "^2.421.0",
     "window-mock": "0.0.13",
     "yargs": "^8.0.2"
   }