diff --git a/package.json b/package.json
index 200b6f9..f385c30 100644
--- a/package.json
+++ b/package.json
@@ -51,10 +51,10 @@
     "polymer-workbox"
   ],
   "dependencies": {
-    "@babel/core": "7.6.2",
+    "@babel/core": "7.6.3",
     "@babel/plugin-syntax-dynamic-import": "7.2.0",
     "@babel/plugin-syntax-object-rest-spread": "7.2.0",
-    "@babel/preset-env": "7.6.2",
+    "@babel/preset-env": "7.6.3",
     "@babel/register": "7.6.2",
     "babel-loader": "8.0.6",
     "chalk": "2.4.2",
@@ -89,7 +89,7 @@
     "yargs": "13.2.2"
   },
   "devDependencies": {
-    "@babel/cli": "7.6.2",
+    "@babel/cli": "7.6.3",
     "ava": "2.4.0",
     "codecov": "3.6.1",
     "glob": "7.1.4",
diff --git a/yarn.lock b/yarn.lock
index ad9f8e9..17caf7e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -26,10 +26,10 @@
     "@ava/babel-plugin-throws-helper" "^4.0.0"
     babel-plugin-espower "^3.0.1"
 
-"@babel/cli@7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/cli/-/cli-7.6.2.tgz#4ce8b5b4b2e4b4c1b7bd841cec62085e2dfc4465"
-  integrity sha512-JDZ+T/br9pPfT2lmAMJypJDTTTHM9ePD/ED10TRjRzJVdEVy+JB3iRlhzYmTt5YkNgHvxWGlUVnLtdv6ruiDrQ==
+"@babel/cli@7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/cli/-/cli-7.6.3.tgz#1b0c62098c8a5e01e4a4a59a52cba9682e7e0906"
+  integrity sha512-kWKOEeuylpa781yCeA5//eEx1u3WtLZqbi2VWXLKmb3QDPb5T2f7Yk311MK7bvvjR70dluAeiu4VXXsG1WwJsw==
   dependencies:
     commander "^2.8.1"
     convert-source-map "^1.1.0"
@@ -39,7 +39,7 @@
     mkdirp "^0.5.1"
     output-file-sync "^2.0.0"
     slash "^2.0.0"
-    source-map "^0.5.0"
+    source-map "^0.6.1"
   optionalDependencies:
     chokidar "^2.1.8"
 
@@ -57,7 +57,27 @@
   dependencies:
     "@babel/highlight" "^7.0.0"
 
-"@babel/core@7.6.2", "@babel/core@^7.6.0":
+"@babel/core@7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.6.3.tgz#44de824e89eaa089bb12da7337bc9bdff2ab68f9"
+  integrity sha512-QfQ5jTBgXLzJuo7Mo8bZK/ePywmgNRgk/UQykiKwEtZPiFIn8ZqE6jB+AnD1hbB1S2xQyL4//it5vuAUOVAMTw==
+  dependencies:
+    "@babel/code-frame" "^7.5.5"
+    "@babel/generator" "^7.6.3"
+    "@babel/helpers" "^7.6.2"
+    "@babel/parser" "^7.6.3"
+    "@babel/template" "^7.6.0"
+    "@babel/traverse" "^7.6.3"
+    "@babel/types" "^7.6.3"
+    convert-source-map "^1.1.0"
+    debug "^4.1.0"
+    json5 "^2.1.0"
+    lodash "^4.17.13"
+    resolve "^1.3.2"
+    semver "^5.4.1"
+    source-map "^0.6.1"
+
+"@babel/core@^7.6.0":
   version "7.6.2"
   resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.6.2.tgz#069a776e8d5e9eefff76236bc8845566bd31dd91"
   integrity sha512-l8zto/fuoZIbncm+01p8zPSDZu/VuuJhAfA7d/AbzM09WR7iVhavvfNDYCNpo1VvLk6E6xgAoP9P+/EMJHuRkQ==
@@ -98,6 +118,16 @@
     lodash "^4.17.13"
     source-map "^0.5.0"
 
+"@babel/generator@^7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.6.3.tgz#71d5375264f93ec7bac7d9f35a67067733f5578e"
+  integrity sha512-hLhYbAb3pHwxjlijC4AQ7mqZdcoujiNaW7izCT04CIowHK8psN0IN8QjDv0iyFtycF5FowUOTwDloIheI25aMw==
+  dependencies:
+    "@babel/types" "^7.6.3"
+    jsesc "^2.5.1"
+    lodash "^4.17.13"
+    source-map "^0.6.1"
+
 "@babel/helper-annotate-as-pure@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0.tgz#323d39dd0b50e10c7c06ca7d7638e6864d8c5c32"
@@ -307,6 +337,11 @@
   resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.6.2.tgz#205e9c95e16ba3b8b96090677a67c9d6075b70a1"
   integrity sha512-mdFqWrSPCmikBoaBYMuBulzTIKuXVPtEISFbRRVNwMWpCms/hmE2kRq0bblUHaNRKrjRlmVbx1sDHmjmRgD2Xg==
 
+"@babel/parser@^7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.6.3.tgz#9eff8b9c3eeae16a74d8d4ff30da2bd0d6f0487e"
+  integrity sha512-sUZdXlva1dt2Vw2RqbMkmfoImubO0D0gaCrNngV6Hi0DA4x3o4mlrq0tbfY0dZEUIccH8I6wQ4qgEtwcpOR6Qg==
+
 "@babel/plugin-proposal-async-generator-functions@^7.2.0":
   version "7.2.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-async-generator-functions/-/plugin-proposal-async-generator-functions-7.2.0.tgz#b289b306669dce4ad20b0252889a15768c9d417e"
@@ -415,10 +450,10 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-block-scoping@^7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.6.2.tgz#96c33ab97a9ae500cc6f5b19e04a7e6553360a79"
-  integrity sha512-zZT8ivau9LOQQaOGC7bQLQOT4XPkPXgN2ERfUgk1X8ql+mVkLc4E8eKk+FO3o0154kxzqenWCorfmEXpEZcrSQ==
+"@babel/plugin-transform-block-scoping@^7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.6.3.tgz#6e854e51fbbaa84351b15d4ddafe342f3a5d542a"
+  integrity sha512-7hvrg75dubcO3ZI2rjYTzUrEuh1E9IyDEhhB6qfcooxhDA33xx2MasuLVgdxzcP6R/lipAC6n9ub9maNW6RKdw==
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
     lodash "^4.17.13"
@@ -540,10 +575,10 @@
     "@babel/helper-module-transforms" "^7.1.0"
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-named-capturing-groups-regex@^7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-named-capturing-groups-regex/-/plugin-transform-named-capturing-groups-regex-7.6.2.tgz#c1ca0bb84b94f385ca302c3932e870b0fb0e522b"
-  integrity sha512-xBdB+XOs+lgbZc2/4F5BVDVcDNS4tcSKQc96KmlqLEAwz6tpYPEvPdmDfvVG0Ssn8lAhronaRs6Z6KSexIpK5g==
+"@babel/plugin-transform-named-capturing-groups-regex@^7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-transform-named-capturing-groups-regex/-/plugin-transform-named-capturing-groups-regex-7.6.3.tgz#aaa6e409dd4fb2e50b6e2a91f7e3a3149dbce0cf"
+  integrity sha512-jTkk7/uE6H2s5w6VlMHeWuH+Pcy2lmdwFoeWCVnvIrDUnB5gQqTVI8WfmEAhF2CDEarGrknZcmSFg1+bkfCoSw==
   dependencies:
     regexpu-core "^4.6.0"
 
@@ -638,10 +673,10 @@
     "@babel/helper-regex" "^7.4.4"
     regexpu-core "^4.6.0"
 
-"@babel/preset-env@7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.6.2.tgz#abbb3ed785c7fe4220d4c82a53621d71fc0c75d3"
-  integrity sha512-Ru7+mfzy9M1/YTEtlDS8CD45jd22ngb9tXnn64DvQK3ooyqSw9K4K9DUWmYknTTVk4TqygL9dqCrZgm1HMea/Q==
+"@babel/preset-env@7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.6.3.tgz#9e1bf05a2e2d687036d24c40e4639dc46cef2271"
+  integrity sha512-CWQkn7EVnwzlOdR5NOm2+pfgSNEZmvGjOhlCHBDq0J8/EStr+G+FvPEiz9B56dR6MoiUFjXhfE4hjLoAKKJtIQ==
   dependencies:
     "@babel/helper-module-imports" "^7.0.0"
     "@babel/helper-plugin-utils" "^7.0.0"
@@ -659,7 +694,7 @@
     "@babel/plugin-transform-arrow-functions" "^7.2.0"
     "@babel/plugin-transform-async-to-generator" "^7.5.0"
     "@babel/plugin-transform-block-scoped-functions" "^7.2.0"
-    "@babel/plugin-transform-block-scoping" "^7.6.2"
+    "@babel/plugin-transform-block-scoping" "^7.6.3"
     "@babel/plugin-transform-classes" "^7.5.5"
     "@babel/plugin-transform-computed-properties" "^7.2.0"
     "@babel/plugin-transform-destructuring" "^7.6.0"
@@ -674,7 +709,7 @@
     "@babel/plugin-transform-modules-commonjs" "^7.6.0"
     "@babel/plugin-transform-modules-systemjs" "^7.5.0"
     "@babel/plugin-transform-modules-umd" "^7.2.0"
-    "@babel/plugin-transform-named-capturing-groups-regex" "^7.6.2"
+    "@babel/plugin-transform-named-capturing-groups-regex" "^7.6.3"
     "@babel/plugin-transform-new-target" "^7.4.4"
     "@babel/plugin-transform-object-super" "^7.5.5"
     "@babel/plugin-transform-parameters" "^7.4.4"
@@ -687,7 +722,7 @@
     "@babel/plugin-transform-template-literals" "^7.4.4"
     "@babel/plugin-transform-typeof-symbol" "^7.2.0"
     "@babel/plugin-transform-unicode-regex" "^7.6.2"
-    "@babel/types" "^7.6.0"
+    "@babel/types" "^7.6.3"
     browserslist "^4.6.0"
     core-js-compat "^3.1.1"
     invariant "^2.2.2"
@@ -753,6 +788,21 @@
     globals "^11.1.0"
     lodash "^4.17.13"
 
+"@babel/traverse@^7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.6.3.tgz#66d7dba146b086703c0fb10dd588b7364cec47f9"
+  integrity sha512-unn7P4LGsijIxaAJo/wpoU11zN+2IaClkQAxcJWBNCMS6cmVh802IyLHNkAjQ0iYnRS3nnxk5O3fuXW28IMxTw==
+  dependencies:
+    "@babel/code-frame" "^7.5.5"
+    "@babel/generator" "^7.6.3"
+    "@babel/helper-function-name" "^7.1.0"
+    "@babel/helper-split-export-declaration" "^7.4.4"
+    "@babel/parser" "^7.6.3"
+    "@babel/types" "^7.6.3"
+    debug "^4.1.0"
+    globals "^11.1.0"
+    lodash "^4.17.13"
+
 "@babel/types@^7.0.0", "@babel/types@^7.2.0", "@babel/types@^7.2.2":
   version "7.2.2"
   resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.2.2.tgz#44e10fc24e33af524488b716cdaee5360ea8ed1e"
@@ -771,6 +821,15 @@
     lodash "^4.17.13"
     to-fast-properties "^2.0.0"
 
+"@babel/types@^7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.6.3.tgz#3f07d96f854f98e2fbd45c64b0cb942d11e8ba09"
+  integrity sha512-CqbcpTxMcpuQTMhjI37ZHVgjBkysg5icREQIEZ0eG1yCNwg3oy+5AaLiOKmjsCj6nqOsa6Hf0ObjRVwokb7srA==
+  dependencies:
+    esutils "^2.0.2"
+    lodash "^4.17.13"
+    to-fast-properties "^2.0.0"
+
 "@concordance/react@^2.0.0":
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/@concordance/react/-/react-2.0.0.tgz#aef913f27474c53731f4fd79cc2f54897de90fde"