diff --git a/package.json b/package.json
index 484910c..e62f085 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
   },
   "devDependencies": {
     "babel-eslint": "^8.0.2",
-    "eslint": "4.9.0",
+    "eslint": "4.19.1",
     "eslint-config-airbnb": "^16.1.0",
     "eslint-config-prettier": "^6.7.0",
     "eslint-plugin-import": "2.7.0",
diff --git a/yarn.lock b/yarn.lock
index 6e404f4..a62eec6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -441,11 +441,11 @@ acorn@^6.0.1:
   version "6.1.1"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.1.1.tgz#7d25ae05bb8ad1f9b699108e1094ecd7884adc1f"
 
-ajv-keywords@^3.0.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.4.0.tgz#4b831e7b531415a7cc518cd404e73f6193c6349d"
+ajv-keywords@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-2.1.1.tgz#617997fc5f60576894c435f940d819e135b80762"
 
-ajv@^5.2.0:
+ajv@^5.2.3, ajv@^5.3.0:
   version "5.5.2"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-5.5.2.tgz#73b5eeca3fab653e3d3f9422b341ad42205dc965"
   dependencies:
@@ -454,7 +454,7 @@ ajv@^5.2.0:
     fast-json-stable-stringify "^2.0.0"
     json-schema-traverse "^0.3.0"
 
-ajv@^6.0.1, ajv@^6.10.0, ajv@^6.5.5:
+ajv@^6.10.0, ajv@^6.5.5:
   version "6.10.2"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.10.2.tgz#d3cea04d6b017b2894ad69040fec8b623eb4bd52"
   dependencies:
@@ -1101,7 +1101,7 @@ debug@^2.1.2, debug@^2.2.0, debug@^2.3.3, debug@^2.6.8, debug@^2.6.9:
   dependencies:
     ms "2.0.0"
 
-debug@^3.0.1, debug@^3.1.0:
+debug@^3.1.0:
   version "3.2.6"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
   dependencies:
@@ -1205,7 +1205,7 @@ doctrine@1.5.0:
     esutils "^2.0.2"
     isarray "^1.0.0"
 
-doctrine@^2.0.0, doctrine@^2.1.0:
+doctrine@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-2.1.0.tgz#5cd01fc101621b42c4cd7f5d1a66243716d3f39d"
   dependencies:
@@ -1437,32 +1437,32 @@ eslint-visitor-keys@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#3f3180fb2e291017716acb4c9d6d5b5c34a6a81d"
 
-eslint@4.9.0:
-  version "4.9.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.9.0.tgz#76879d274068261b191fe0f2f56c74c2f4208e8b"
+eslint@4.19.1:
+  version "4.19.1"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.19.1.tgz#32d1d653e1d90408854bfb296f076ec7e186a300"
   dependencies:
-    ajv "^5.2.0"
+    ajv "^5.3.0"
     babel-code-frame "^6.22.0"
     chalk "^2.1.0"
     concat-stream "^1.6.0"
     cross-spawn "^5.1.0"
-    debug "^3.0.1"
-    doctrine "^2.0.0"
+    debug "^3.1.0"
+    doctrine "^2.1.0"
     eslint-scope "^3.7.1"
-    espree "^3.5.1"
+    eslint-visitor-keys "^1.0.0"
+    espree "^3.5.4"
     esquery "^1.0.0"
-    estraverse "^4.2.0"
     esutils "^2.0.2"
     file-entry-cache "^2.0.0"
     functional-red-black-tree "^1.0.1"
     glob "^7.1.2"
-    globals "^9.17.0"
+    globals "^11.0.1"
     ignore "^3.3.3"
     imurmurhash "^0.1.4"
     inquirer "^3.0.6"
     is-resolvable "^1.0.0"
     js-yaml "^3.9.1"
-    json-stable-stringify "^1.0.1"
+    json-stable-stringify-without-jsonify "^1.0.1"
     levn "^0.3.0"
     lodash "^4.17.4"
     minimatch "^3.0.2"
@@ -1472,14 +1472,15 @@ eslint@4.9.0:
     path-is-inside "^1.0.2"
     pluralize "^7.0.0"
     progress "^2.0.0"
+    regexpp "^1.0.1"
     require-uncached "^1.0.3"
     semver "^5.3.0"
     strip-ansi "^4.0.0"
     strip-json-comments "~2.0.1"
-    table "^4.0.1"
+    table "4.0.2"
     text-table "~0.2.0"
 
-espree@^3.5.1:
+espree@^3.5.4:
   version "3.5.4"
   resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.4.tgz#b0f447187c8a8bed944b815a660bddf5deb5d1a7"
   dependencies:
@@ -1867,13 +1868,9 @@ global-prefix@^1.0.1:
     is-windows "^1.0.1"
     which "^1.2.14"
 
-globals@^11.1.0:
-  version "11.11.0"
-  resolved "https://registry.yarnpkg.com/globals/-/globals-11.11.0.tgz#dcf93757fa2de5486fbeed7118538adf789e9c2e"
-
-globals@^9.17.0:
-  version "9.18.0"
-  resolved "https://registry.yarnpkg.com/globals/-/globals-9.18.0.tgz#aa3896b3e69b487f17e31ed2143d69a8e30c2d8a"
+globals@^11.0.1, globals@^11.1.0:
+  version "11.12.0"
+  resolved "https://registry.yarnpkg.com/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
 
 graceful-fs@^4.1.11, graceful-fs@^4.1.2:
   version "4.1.15"
@@ -2798,11 +2795,9 @@ json-schema@0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/json-schema/-/json-schema-0.2.3.tgz#b480c892e59a2f05954ce727bd3f2a4e882f9e13"
 
-json-stable-stringify@^1.0.1:
+json-stable-stringify-without-jsonify@^1.0.1:
   version "1.0.1"
-  resolved "https://registry.yarnpkg.com/json-stable-stringify/-/json-stable-stringify-1.0.1.tgz#9a759d39c5f2ff503fd5300646ed445f88c4f9af"
-  dependencies:
-    jsonify "~0.0.0"
+  resolved "https://registry.yarnpkg.com/json-stable-stringify-without-jsonify/-/json-stable-stringify-without-jsonify-1.0.1.tgz#9db7b59496ad3f3cfef30a75142d2d930ad72651"
 
 json-stringify-safe@~5.0.1:
   version "5.0.1"
@@ -2814,10 +2809,6 @@ json5@^2.1.0:
   dependencies:
     minimist "^1.2.0"
 
-jsonify@~0.0.0:
-  version "0.0.0"
-  resolved "https://registry.yarnpkg.com/jsonify/-/jsonify-0.0.0.tgz#2c74b6ee41d93ca51b7b5aaee8f503631d252a73"
-
 jsprim@^1.2.2:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/jsprim/-/jsprim-1.4.1.tgz#313e66bc1e5cc06e438bc1b7499c2e5c56acb6a2"
@@ -4074,6 +4065,10 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
+regexpp@^1.0.1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-1.1.0.tgz#0e3516dd0b7904f413d2d4193dce4618c3a689ab"
+
 remove-trailing-separator@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/remove-trailing-separator/-/remove-trailing-separator-1.1.0.tgz#c24bce2a283adad5bc3f58e0d48249b92379d8ef"
@@ -4612,12 +4607,12 @@ symbol-tree@^3.2.2:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.2.tgz#ae27db38f660a7ae2e1c3b7d1bc290819b8519e6"
 
-table@^4.0.1:
-  version "4.0.3"
-  resolved "https://registry.yarnpkg.com/table/-/table-4.0.3.tgz#00b5e2b602f1794b9acaf9ca908a76386a7813bc"
+table@4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/table/-/table-4.0.2.tgz#a33447375391e766ad34d3486e6e2aedc84d2e36"
   dependencies:
-    ajv "^6.0.1"
-    ajv-keywords "^3.0.0"
+    ajv "^5.2.3"
+    ajv-keywords "^2.1.0"
     chalk "^2.1.0"
     lodash "^4.17.4"
     slice-ansi "1.0.0"