diff --git a/package.json b/package.json
index 99c231a..951c6ed 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   "devDependencies": {
     "eslint": "4.19.1",
     "eslint-plugin-prettier": "2.6.0",
-    "jest": "22.4.2",
+    "jest": "22.4.4",
     "localtunnel": "1.8.3",
     "prettier": "1.19.1"
   },
diff --git a/yarn.lock b/yarn.lock
index 22e0ccf..7dc1568 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -381,12 +381,13 @@ babel-helpers@^6.24.1:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-jest@^22.4.1:
-  version "22.4.1"
-  resolved "https://registry.yarnpkg.com/babel-jest/-/babel-jest-22.4.1.tgz#ff53ebca45957347f27ff4666a31499fbb4c4ddd"
+babel-jest@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/babel-jest/-/babel-jest-22.4.4.tgz#977259240420e227444ebe49e226a61e49ea659d"
+  integrity sha512-A9NB6/lZhYyypR9ATryOSDcqBaqNdzq4U+CN+/wcMsLcmKkPxQEoTKLajGfd3IkxNyVBT8NewUK2nWyGbSzHEQ==
   dependencies:
     babel-plugin-istanbul "^4.1.5"
-    babel-preset-jest "^22.4.1"
+    babel-preset-jest "^22.4.4"
 
 babel-messages@^6.23.0:
   version "6.23.0"
@@ -402,19 +403,21 @@ babel-plugin-istanbul@^4.1.5:
     istanbul-lib-instrument "^1.7.5"
     test-exclude "^4.1.1"
 
-babel-plugin-jest-hoist@^22.4.1:
-  version "22.4.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-jest-hoist/-/babel-plugin-jest-hoist-22.4.1.tgz#d712fe5da8b6965f3191dacddbefdbdf4fb66d63"
+babel-plugin-jest-hoist@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/babel-plugin-jest-hoist/-/babel-plugin-jest-hoist-22.4.4.tgz#b9851906eab34c7bf6f8c895a2b08bea1a844c0b"
+  integrity sha512-DUvGfYaAIlkdnygVIEl0O4Av69NtuQWcrjMOv6DODPuhuGLDnbsARz3AwiiI/EkIMMlxQDUcrZ9yoyJvTNjcVQ==
 
 babel-plugin-syntax-object-rest-spread@^6.13.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz#fd6536f2bce13836ffa3a5458c4903a597bb3bf5"
 
-babel-preset-jest@^22.4.1:
-  version "22.4.1"
-  resolved "https://registry.yarnpkg.com/babel-preset-jest/-/babel-preset-jest-22.4.1.tgz#efa2e5f5334242a9457a068452d7d09735db172a"
+babel-preset-jest@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/babel-preset-jest/-/babel-preset-jest-22.4.4.tgz#ec9fbd8bcd7dfd24b8b5320e0e688013235b7c39"
+  integrity sha512-+dxMtOFwnSYWfum0NaEc0O03oSdwBsjx4tMSChRDPGwu/4wSY6Q6ANW3wkjKpJzzguaovRs/DODcT4hbSN8yiA==
   dependencies:
-    babel-plugin-jest-hoist "^22.4.1"
+    babel-plugin-jest-hoist "^22.4.4"
     babel-plugin-syntax-object-rest-spread "^6.13.0"
 
 babel-register@^6.26.0:
@@ -2057,9 +2060,10 @@ jest-changed-files@^22.2.0:
   dependencies:
     throat "^4.0.0"
 
-jest-cli@^22.4.2:
-  version "22.4.2"
-  resolved "https://registry.yarnpkg.com/jest-cli/-/jest-cli-22.4.2.tgz#e6546dc651e13d164481aa3e76e53ac4f4edab06"
+jest-cli@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/jest-cli/-/jest-cli-22.4.4.tgz#68cd2a2aae983adb1e6638248ca21082fd6d9e90"
+  integrity sha512-I9dsgkeyjVEEZj9wrGrqlH+8OlNob9Iptyl+6L5+ToOLJmHm4JwOPatin1b2Bzp5R5YRQJ+oiedx7o1H7wJzhA==
   dependencies:
     ansi-escapes "^3.0.0"
     chalk "^2.0.1"
@@ -2073,18 +2077,18 @@ jest-cli@^22.4.2:
     istanbul-lib-instrument "^1.8.0"
     istanbul-lib-source-maps "^1.2.1"
     jest-changed-files "^22.2.0"
-    jest-config "^22.4.2"
+    jest-config "^22.4.4"
     jest-environment-jsdom "^22.4.1"
     jest-get-type "^22.1.0"
     jest-haste-map "^22.4.2"
     jest-message-util "^22.4.0"
     jest-regex-util "^22.1.0"
     jest-resolve-dependencies "^22.1.0"
-    jest-runner "^22.4.2"
-    jest-runtime "^22.4.2"
+    jest-runner "^22.4.4"
+    jest-runtime "^22.4.4"
     jest-snapshot "^22.4.0"
     jest-util "^22.4.1"
-    jest-validate "^22.4.2"
+    jest-validate "^22.4.4"
     jest-worker "^22.2.2"
     micromatch "^2.3.11"
     node-notifier "^5.2.1"
@@ -2096,20 +2100,21 @@ jest-cli@^22.4.2:
     which "^1.2.12"
     yargs "^10.0.3"
 
-jest-config@^22.4.2:
-  version "22.4.2"
-  resolved "https://registry.yarnpkg.com/jest-config/-/jest-config-22.4.2.tgz#580ba5819bf81a5e48f4fd470e8b81834f45c855"
+jest-config@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/jest-config/-/jest-config-22.4.4.tgz#72a521188720597169cd8b4ff86934ef5752d86a"
+  integrity sha512-9CKfo1GC4zrXSoMLcNeDvQBfgtqGTB1uP8iDIZ97oB26RCUb886KkKWhVcpyxVDOUxbhN+uzcBCeFe7w+Iem4A==
   dependencies:
     chalk "^2.0.1"
     glob "^7.1.1"
     jest-environment-jsdom "^22.4.1"
     jest-environment-node "^22.4.1"
     jest-get-type "^22.1.0"
-    jest-jasmine2 "^22.4.2"
+    jest-jasmine2 "^22.4.4"
     jest-regex-util "^22.1.0"
     jest-resolve "^22.4.2"
     jest-util "^22.4.1"
-    jest-validate "^22.4.2"
+    jest-validate "^22.4.4"
     pretty-format "^22.4.0"
 
 jest-diff@^22.4.0:
@@ -2162,9 +2167,10 @@ jest-haste-map@^22.4.2:
     micromatch "^2.3.11"
     sane "^2.0.0"
 
-jest-jasmine2@^22.4.2:
-  version "22.4.2"
-  resolved "https://registry.yarnpkg.com/jest-jasmine2/-/jest-jasmine2-22.4.2.tgz#dfd3d259579ed6f52510d8f1ab692808f0d40691"
+jest-jasmine2@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/jest-jasmine2/-/jest-jasmine2-22.4.4.tgz#c55f92c961a141f693f869f5f081a79a10d24e23"
+  integrity sha512-nK3vdUl50MuH7vj/8at7EQVjPGWCi3d5+6aCi7Gxy/XMWdOdbH1qtO/LjKbqD8+8dUAEH+BVVh7HkjpCWC1CSw==
   dependencies:
     chalk "^2.0.1"
     co "^4.6.0"
@@ -2223,39 +2229,41 @@ jest-resolve@^22.4.2:
     browser-resolve "^1.11.2"
     chalk "^2.0.1"
 
-jest-runner@^22.4.2:
-  version "22.4.2"
-  resolved "https://registry.yarnpkg.com/jest-runner/-/jest-runner-22.4.2.tgz#19390ea9d99f768973e16f95a1efa351c0017e87"
+jest-runner@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/jest-runner/-/jest-runner-22.4.4.tgz#dfca7b7553e0fa617e7b1291aeb7ce83e540a907"
+  integrity sha512-5S/OpB51igQW9xnkM5Tgd/7ZjiAuIoiJAVtvVTBcEBiXBIFzWM3BAMPBM19FX68gRV0KWyFuGKj0EY3M3aceeQ==
   dependencies:
     exit "^0.1.2"
-    jest-config "^22.4.2"
+    jest-config "^22.4.4"
     jest-docblock "^22.4.0"
     jest-haste-map "^22.4.2"
-    jest-jasmine2 "^22.4.2"
+    jest-jasmine2 "^22.4.4"
     jest-leak-detector "^22.4.0"
     jest-message-util "^22.4.0"
-    jest-runtime "^22.4.2"
+    jest-runtime "^22.4.4"
     jest-util "^22.4.1"
     jest-worker "^22.2.2"
     throat "^4.0.0"
 
-jest-runtime@^22.4.2:
-  version "22.4.2"
-  resolved "https://registry.yarnpkg.com/jest-runtime/-/jest-runtime-22.4.2.tgz#0de0444f65ce15ee4f2e0055133fc7c17b9168f3"
+jest-runtime@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/jest-runtime/-/jest-runtime-22.4.4.tgz#9ba7792fc75582a5be0f79af6f8fe8adea314048"
+  integrity sha512-WRTj9m///npte1YjuphCYX7GRY/c2YvJImU9t7qOwFcqHr4YMzmX6evP/3Sehz5DKW2Vi8ONYPCFWe36JVXxfw==
   dependencies:
     babel-core "^6.0.0"
-    babel-jest "^22.4.1"
+    babel-jest "^22.4.4"
     babel-plugin-istanbul "^4.1.5"
     chalk "^2.0.1"
     convert-source-map "^1.4.0"
     exit "^0.1.2"
     graceful-fs "^4.1.11"
-    jest-config "^22.4.2"
+    jest-config "^22.4.4"
     jest-haste-map "^22.4.2"
     jest-regex-util "^22.1.0"
     jest-resolve "^22.4.2"
     jest-util "^22.4.1"
-    jest-validate "^22.4.2"
+    jest-validate "^22.4.4"
     json-stable-stringify "^1.0.1"
     micromatch "^2.3.11"
     realpath-native "^1.0.0"
@@ -2291,12 +2299,13 @@ jest-util@^22.4.1:
     mkdirp "^0.5.1"
     source-map "^0.6.0"
 
-jest-validate@^22.4.2:
-  version "22.4.2"
-  resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-22.4.2.tgz#e789a4e056173bf97fe797a2df2d52105c57d4f4"
+jest-validate@^22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-22.4.4.tgz#1dd0b616ef46c995de61810d85f57119dbbcec4d"
+  integrity sha512-dmlf4CIZRGvkaVg3fa0uetepcua44DHtktHm6rcoNVtYlpwe6fEJRkMFsaUVcFHLzbuBJ2cPw9Gl9TKfnzMVwg==
   dependencies:
     chalk "^2.0.1"
-    jest-config "^22.4.2"
+    jest-config "^22.4.4"
     jest-get-type "^22.1.0"
     leven "^2.1.0"
     pretty-format "^22.4.0"
@@ -2307,12 +2316,13 @@ jest-worker@^22.2.2:
   dependencies:
     merge-stream "^1.0.1"
 
-jest@22.4.2:
-  version "22.4.2"
-  resolved "https://registry.yarnpkg.com/jest/-/jest-22.4.2.tgz#34012834a49bf1bdd3bc783850ab44e4499afc20"
+jest@22.4.4:
+  version "22.4.4"
+  resolved "https://registry.yarnpkg.com/jest/-/jest-22.4.4.tgz#ffb36c9654b339a13e10b3d4b338eb3e9d49f6eb"
+  integrity sha512-eBhhW8OS/UuX3HxgzNBSVEVhSuRDh39Z1kdYkQVWna+scpgsrD7vSeBI7tmEvsguPDMnfJodW28YBnhv/BzSew==
   dependencies:
     import-local "^1.0.0"
-    jest-cli "^22.4.2"
+    jest-cli "^22.4.4"
 
 js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "3.0.2"