diff --git a/package.json b/package.json
index 6d2b4321..83b260b9 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "@types/documentdb": "^1.10.5",
     "@types/express": "^4.16.0",
     "@types/html-to-text": "^1.4.31",
-    "@types/jest": "^23.1.0",
+    "@types/jest": "^24.9.0",
     "@types/lolex": "^2.1.3",
     "@types/node": "^6.0.0",
     "@types/nodemailer": "^4.6.2",
diff --git a/yarn.lock b/yarn.lock
index 6899c9f8..2806f798 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -94,6 +94,15 @@
     camelcase "^5.0.0"
     prettier "^1.13.7"
 
+"@jest/types@^24.9.0":
+  version "24.9.0"
+  resolved "https://registry.yarnpkg.com/@jest/types/-/types-24.9.0.tgz#63cb26cb7500d069e5a389441a7c6ab5e909fc59"
+  integrity sha512-XKK7ze1apu5JWQ5eZjHITP66AX+QsLlbaJRBGYr8pNzwcAE2JVkwnf0yqjHTsDRcjR0mujy/NmZMXw5kl+kGBw==
+  dependencies:
+    "@types/istanbul-lib-coverage" "^2.0.0"
+    "@types/istanbul-reports" "^1.1.1"
+    "@types/yargs" "^13.0.0"
+
 "@octokit/rest@^15.9.5":
   version "15.10.0"
   resolved "https://registry.yarnpkg.com/@octokit/rest/-/rest-15.10.0.tgz#9baf7430e55edf1a1024c35ae72ed2f5fc6e90e9"
@@ -167,9 +176,32 @@
   version "1.4.31"
   resolved "https://registry.yarnpkg.com/@types/html-to-text/-/html-to-text-1.4.31.tgz#3b73aa59f127551cc0ce615346caa730e7622f9f"
 
-"@types/jest@^23.1.0":
-  version "23.3.1"
-  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-23.3.1.tgz#a4319aedb071d478e6f407d1c4578ec8156829cf"
+"@types/istanbul-lib-coverage@*", "@types/istanbul-lib-coverage@^2.0.0":
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.1.tgz#42995b446db9a48a11a07ec083499a860e9138ff"
+  integrity sha512-hRJD2ahnnpLgsj6KWMYSrmXkM3rm2Dl1qkx6IOFD5FnuNPXJIG5L0dhgKXCYTRMGzU4n0wImQ/xfmRc4POUFlg==
+
+"@types/istanbul-lib-report@*":
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@types/istanbul-lib-report/-/istanbul-lib-report-1.1.1.tgz#e5471e7fa33c61358dd38426189c037a58433b8c"
+  integrity sha512-3BUTyMzbZa2DtDI2BkERNC6jJw2Mr2Y0oGI7mRxYNBPxppbtEK1F66u3bKwU2g+wxwWI7PAoRpJnOY1grJqzHg==
+  dependencies:
+    "@types/istanbul-lib-coverage" "*"
+
+"@types/istanbul-reports@^1.1.1":
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@types/istanbul-reports/-/istanbul-reports-1.1.1.tgz#7a8cbf6a406f36c8add871625b278eaf0b0d255a"
+  integrity sha512-UpYjBi8xefVChsCoBpKShdxTllC9pwISirfoZsUa2AAdQg/Jd2KQGtSbw+ya7GPo7x/wAPlH6JBhKhAsXUEZNA==
+  dependencies:
+    "@types/istanbul-lib-coverage" "*"
+    "@types/istanbul-lib-report" "*"
+
+"@types/jest@^24.9.0":
+  version "24.9.0"
+  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-24.9.0.tgz#78c6991cd1734cf0d390be24875e310bb0a9fb74"
+  integrity sha512-dXvuABY9nM1xgsXlOtLQXJKdacxZJd7AtvLsKZ/0b57ruMXDKCOXAC/M75GbllQX6o1pcZ5hAG4JzYy7Z/wM2w==
+  dependencies:
+    jest-diff "^24.3.0"
 
 "@types/lolex@^2.1.3":
   version "2.1.3"
@@ -262,6 +294,18 @@
   dependencies:
     winston "*"
 
+"@types/yargs-parser@*":
+  version "15.0.0"
+  resolved "https://registry.yarnpkg.com/@types/yargs-parser/-/yargs-parser-15.0.0.tgz#cb3f9f741869e20cce330ffbeb9271590483882d"
+  integrity sha512-FA/BWv8t8ZWJ+gEOnLLd8ygxH/2UFbAvgEonyfN6yWGLKc7zVjbpl2Y4CTjid9h2RfgPP6SEt6uHwEOply00yw==
+
+"@types/yargs@^13.0.0":
+  version "13.0.5"
+  resolved "https://registry.yarnpkg.com/@types/yargs/-/yargs-13.0.5.tgz#18121bfd39dc12f280cee58f92c5b21d32041908"
+  integrity sha512-CF/+sxTO7FOwbIRL4wMv0ZYLCRfMid2HQpzDRyViH7kSpfoAFiMdGqKIxb1PxWfjtQXQhnQuD33lvRHNwr809Q==
+  dependencies:
+    "@types/yargs-parser" "*"
+
 a-sync-waterfall@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/a-sync-waterfall/-/a-sync-waterfall-1.0.1.tgz#75b6b6aa72598b497a125e7a2770f14f4c8a1fa7"
@@ -392,6 +436,11 @@ ansi-regex@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-3.0.0.tgz#ed0317c322064f79466c02966bddb605ab37d998"
 
+ansi-regex@^4.0.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-4.1.0.tgz#8b9f8f08cf1acb843756a839ca8c7e3168c51997"
+  integrity sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==
+
 ansi-styles@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
@@ -681,7 +730,7 @@ babel-core@^6.0.0, babel-core@^6.26.0:
 
 babel-generator@6.11.4:
   version "6.11.4"
-  resolved "http://registry.npmjs.org/babel-generator/-/babel-generator-6.11.4.tgz#14f6933abb20c62666d27e3b7b9f5b9dc0712a9a"
+  resolved "https://registry.npmjs.org/babel-generator/-/babel-generator-6.11.4.tgz#14f6933abb20c62666d27e3b7b9f5b9dc0712a9a"
   dependencies:
     babel-messages "^6.8.0"
     babel-runtime "^6.9.0"
@@ -759,7 +808,7 @@ babel-plugin-jest-hoist@^23.2.0:
 
 babel-plugin-syntax-object-rest-spread@^6.13.0:
   version "6.13.0"
-  resolved "http://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz#fd6536f2bce13836ffa3a5458c4903a597bb3bf5"
+  resolved "https://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz#fd6536f2bce13836ffa3a5458c4903a597bb3bf5"
 
 babel-polyfill@^6.23.0:
   version "6.26.0"
@@ -813,7 +862,7 @@ babel-template@^6.16.0, babel-template@^6.24.1, babel-template@^6.26.0:
 
 babel-traverse@6.12.0:
   version "6.12.0"
-  resolved "http://registry.npmjs.org/babel-traverse/-/babel-traverse-6.12.0.tgz#f22f54fa0d6eeb7f63585246bab6e637858f5d94"
+  resolved "https://registry.npmjs.org/babel-traverse/-/babel-traverse-6.12.0.tgz#f22f54fa0d6eeb7f63585246bab6e637858f5d94"
   dependencies:
     babel-code-frame "^6.8.0"
     babel-messages "^6.8.0"
@@ -850,7 +899,7 @@ babel-types@^6.0.0, babel-types@^6.10.2, babel-types@^6.18.0, babel-types@^6.26.
 
 babylon@6.14.1:
   version "6.14.1"
-  resolved "http://registry.npmjs.org/babylon/-/babylon-6.14.1.tgz#956275fab72753ad9b3435d7afe58f8bf0a29815"
+  resolved "https://registry.npmjs.org/babylon/-/babylon-6.14.1.tgz#956275fab72753ad9b3435d7afe58f8bf0a29815"
 
 babylon@^6.18.0, babylon@^6.7.0:
   version "6.18.0"
@@ -1064,7 +1113,7 @@ buffer-xor@^1.0.3:
 
 buffer@^4.3.0:
   version "4.9.1"
-  resolved "http://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz#6d1bb601b07a4efced97094132093027c95bc298"
+  resolved "https://registry.npmjs.org/buffer/-/buffer-4.9.1.tgz#6d1bb601b07a4efced97094132093027c95bc298"
   dependencies:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
@@ -1165,7 +1214,7 @@ center-align@^0.1.1:
 
 chalk@^1.0.0, chalk@^1.1.1, chalk@^1.1.3:
   version "1.1.3"
-  resolved "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
+  resolved "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
   dependencies:
     ansi-styles "^2.2.1"
     escape-string-regexp "^1.0.2"
@@ -1921,6 +1970,11 @@ diagnostics@^1.1.1:
     enabled "1.0.x"
     kuler "1.0.x"
 
+diff-sequences@^24.9.0:
+  version "24.9.0"
+  resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-24.9.0.tgz#5715d6244e2aa65f48bba0bc972db0b0b11e95b5"
+  integrity sha512-Dj6Wk3tWyTE+Fo1rW8v0Xhwk80um6yFYKbuAxc9c3EZxIHFDYwbi34Uk42u1CdnIiVorvt4RmlSDjIPyzGC2ew==
+
 diff@^3.0.0, diff@^3.1.0, diff@^3.2.0:
   version "3.5.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
@@ -2290,7 +2344,7 @@ event-emitter@~0.3.5:
 
 event-stream@~3.3.0:
   version "3.3.4"
-  resolved "http://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz#4ab4c9a0f5a54db9338b4c34d86bfce8f4b35571"
+  resolved "https://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz#4ab4c9a0f5a54db9338b4c34d86bfce8f4b35571"
   dependencies:
     duplexer "~0.1.1"
     from "~0"
@@ -3956,6 +4010,16 @@ jest-diff@^23.5.0:
     jest-get-type "^22.1.0"
     pretty-format "^23.5.0"
 
+jest-diff@^24.3.0:
+  version "24.9.0"
+  resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-24.9.0.tgz#931b7d0d5778a1baf7452cb816e325e3724055da"
+  integrity sha512-qMfrTs8AdJE2iqrTp0hzh7kTd2PQWrsFyj9tORoKmu32xjPjeE4NyjVRDz8ybYwqS2ik8N4hsIpiVTyFeo2lBQ==
+  dependencies:
+    chalk "^2.0.1"
+    diff-sequences "^24.9.0"
+    jest-get-type "^24.9.0"
+    pretty-format "^24.9.0"
+
 jest-docblock@^21.0.0:
   version "21.2.0"
   resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-21.2.0.tgz#51529c3b30d5fd159da60c27ceedc195faf8d414"
@@ -4011,6 +4075,11 @@ jest-get-type@^22.1.0:
   version "22.4.3"
   resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-22.4.3.tgz#e3a8504d8479342dd4420236b322869f18900ce4"
 
+jest-get-type@^24.9.0:
+  version "24.9.0"
+  resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-24.9.0.tgz#1684a0c8a50f2e4901b6644ae861f579eed2ef0e"
+  integrity sha512-lUseMzAley4LhIcpSP9Jf+fTrQ4a1yHQwLNeeVa2cEmbCGeoZAtYPOIv8JaxLD/sUpKxetKGP+gsHl8f8TSj8Q==
+
 jest-haste-map@^18.1.0:
   version "18.1.0"
   resolved "https://registry.yarnpkg.com/jest-haste-map/-/jest-haste-map-18.1.0.tgz#06839c74b770a40c1a106968851df8d281c08375"
@@ -4952,7 +5021,7 @@ lodash.unescape@^4.0.1:
 
 "lodash@^3.0.1 || ^2.0.0":
   version "3.10.1"
-  resolved "http://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
+  resolved "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
 
 lodash@^4.0.0, lodash@^4.1.0, lodash@^4.13.1, lodash@^4.17.10, lodash@^4.17.2, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.0:
   version "4.17.10"
@@ -4960,7 +5029,7 @@ lodash@^4.0.0, lodash@^4.1.0, lodash@^4.13.1, lodash@^4.17.10, lodash@^4.17.2, l
 
 lodash@~1.0.1:
   version "1.0.2"
-  resolved "http://registry.npmjs.org/lodash/-/lodash-1.0.2.tgz#8f57560c83b59fc270bd3d561b690043430e2551"
+  resolved "https://registry.npmjs.org/lodash/-/lodash-1.0.2.tgz#8f57560c83b59fc270bd3d561b690043430e2551"
 
 logform@^1.9.1:
   version "1.9.1"
@@ -5227,11 +5296,11 @@ minimatch@~0.2.11:
 
 minimist@0.0.8, minimist@~0.0.1:
   version "0.0.8"
-  resolved "http://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
+  resolved "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
 
 minimist@1.2.0, minimist@^1.1.0, minimist@^1.1.1, minimist@^1.2.0:
   version "1.2.0"
-  resolved "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
+  resolved "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
 minipass@^2.2.1, minipass@^2.3.3:
   version "2.3.4"
@@ -5538,7 +5607,7 @@ mjml@^4.1.0:
 
 mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.0:
   version "0.5.1"
-  resolved "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
+  resolved "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
     minimist "0.0.8"
 
@@ -5964,7 +6033,7 @@ os-homedir@^1.0.0:
 
 os-locale@^1.4.0:
   version "1.4.0"
-  resolved "http://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz#20f9f17ae29ed345e8bde583b13d2009803c14d9"
+  resolved "https://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz#20f9f17ae29ed345e8bde583b13d2009803c14d9"
   dependencies:
     lcid "^1.0.0"
 
@@ -6305,6 +6374,16 @@ pretty-format@^23.5.0:
     ansi-regex "^3.0.0"
     ansi-styles "^3.2.0"
 
+pretty-format@^24.9.0:
+  version "24.9.0"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-24.9.0.tgz#12fac31b37019a4eea3c11aa9a959eb7628aa7c9"
+  integrity sha512-00ZMZUiHaJrNfk33guavqgvfJS30sLYf0f8+Srklv0AMPodGGHcoHgksZ3OThYnIvOd+8yMCn0YiEOogjlgsnA==
+  dependencies:
+    "@jest/types" "^24.9.0"
+    ansi-regex "^4.0.0"
+    ansi-styles "^3.2.0"
+    react-is "^16.8.4"
+
 pretty-hrtime@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/pretty-hrtime/-/pretty-hrtime-1.0.3.tgz#b7e3ea42435a4c9b2759d99e0f201eb195802ee1"
@@ -6450,6 +6529,11 @@ rc@^1.2.7:
     minimist "^1.2.0"
     strip-json-comments "~2.0.1"
 
+react-is@^16.8.4:
+  version "16.12.0"
+  resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.12.0.tgz#2cc0fe0fba742d97fd527c42a13bec4eeb06241c"
+  integrity sha512-rPCkf/mWBtKc97aLL9/txD8DZdemK0vkA3JMLShjlJB3Pj3s+lpf1KaBzMfQrAmhMQB0n1cU/SUGgKKBCe837Q==
+
 read-pkg-up@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-1.0.1.tgz#9d63c13276c065918d57f002a57f40a1b643fb02"
@@ -6776,7 +6860,7 @@ rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6.2:
 
 rimraf@~2.5.4:
   version "2.5.4"
-  resolved "http://registry.npmjs.org/rimraf/-/rimraf-2.5.4.tgz#96800093cbf1a0c86bd95b4625467535c29dfa04"
+  resolved "https://registry.npmjs.org/rimraf/-/rimraf-2.5.4.tgz#96800093cbf1a0c86bd95b4625467535c29dfa04"
   dependencies:
     glob "^7.0.5"
 
@@ -7902,7 +7986,7 @@ validator@^10.0.0, validator@^10.1.0, validator@^10.4.0:
 
 validator@~9.4.1:
   version "9.4.1"
-  resolved "http://registry.npmjs.org/validator/-/validator-9.4.1.tgz#abf466d398b561cd243050112c6ff1de6cc12663"
+  resolved "https://registry.npmjs.org/validator/-/validator-9.4.1.tgz#abf466d398b561cd243050112c6ff1de6cc12663"
 
 vary@^1, vary@~1.1.2:
   version "1.1.2"
@@ -8199,7 +8283,7 @@ worker-farm@^1.3.1:
 
 wrap-ansi@^2.0.0:
   version "2.1.0"
-  resolved "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"
+  resolved "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"
   dependencies:
     string-width "^1.0.1"
     strip-ansi "^3.0.1"