diff --git a/package.json b/package.json
index f8c1ea4fa3ecf630a9c7456f6e56fce4698b9268..ad4fe775c78f626dc7d92fed514e249125aa910e 100644
--- a/package.json
+++ b/package.json
@@ -162,13 +162,13 @@
     "re2": "1.10.4"
   },
   "devDependencies": {
-    "@babel/cli": "7.6.2",
-    "@babel/core": "7.6.2",
-    "@babel/node": "7.6.2",
+    "@babel/cli": "7.6.4",
+    "@babel/core": "7.6.4",
+    "@babel/node": "7.6.3",
     "@babel/plugin-proposal-class-properties": "7.5.5",
     "@babel/plugin-proposal-object-rest-spread": "7.6.2",
     "@babel/plugin-syntax-dynamic-import": "7.2.0",
-    "@babel/preset-env": "7.6.2",
+    "@babel/preset-env": "7.6.3",
     "@babel/preset-typescript": "7.6.0",
     "@types/bunyan": "1.8.6",
     "@types/chai": "4.2.3",
diff --git a/yarn.lock b/yarn.lock
index 64bae308348b66940725e24771071ed2faa3ab0d..9521d4390d4714b85439aeeeac16add78004dd91 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,10 +2,10 @@
 # yarn lockfile v1
 
 
-"@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@7.6.4":
+  version "7.6.4"
+  resolved "https://registry.yarnpkg.com/@babel/cli/-/cli-7.6.4.tgz#9b35a4e15fa7d8f487418aaa8229c8b0bc815f20"
+  integrity sha512-tqrDyvPryBM6xjIyKKUwr3s8CzmmYidwgdswd7Uc/Cv0ogZcuS1TYQTLx/eWKP3UbJ6JxZAiYlBZabXm/rtRsQ==
   dependencies:
     commander "^2.8.1"
     convert-source-map "^1.1.0"
@@ -26,18 +26,18 @@
   dependencies:
     "@babel/highlight" "^7.0.0"
 
-"@babel/core@7.6.2", "@babel/core@^7.1.0":
-  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==
+"@babel/core@7.6.4", "@babel/core@^7.1.0":
+  version "7.6.4"
+  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.6.4.tgz#6ebd9fe00925f6c3e177bb726a188b5f578088ff"
+  integrity sha512-Rm0HGw101GY8FTzpWSyRbki/jzq+/PkNQJ+nSulrdY6gFGOsNseCqD6KHRYe2E+EdzuBdr2pxCp6s4Uk6eJ+XQ==
   dependencies:
     "@babel/code-frame" "^7.5.5"
-    "@babel/generator" "^7.6.2"
+    "@babel/generator" "^7.6.4"
     "@babel/helpers" "^7.6.2"
-    "@babel/parser" "^7.6.2"
+    "@babel/parser" "^7.6.4"
     "@babel/template" "^7.6.0"
-    "@babel/traverse" "^7.6.2"
-    "@babel/types" "^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"
@@ -46,12 +46,12 @@
     semver "^5.4.1"
     source-map "^0.5.0"
 
-"@babel/generator@^7.4.0", "@babel/generator@^7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.6.2.tgz#dac8a3c2df118334c2a29ff3446da1636a8f8c03"
-  integrity sha512-j8iHaIW4gGPnViaIHI7e9t/Hl8qLjERI6DcV9kEpAIDJsAOrcnXqRS7t+QbhL76pwbtqP+QCQLL0z1CyVmtjjQ==
+"@babel/generator@^7.4.0", "@babel/generator@^7.6.3", "@babel/generator@^7.6.4":
+  version "7.6.4"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.6.4.tgz#a4f8437287bf9671b07f483b76e3bb731bc97671"
+  integrity sha512-jsBuXkFoZxk0yWLyGI9llT9oiQ2FeTASmRFE32U+aaDTfoE92t78eroO7PTpU/OrYq38hlcDM6vbfLDaOLy+7w==
   dependencies:
-    "@babel/types" "^7.6.0"
+    "@babel/types" "^7.6.3"
     jsesc "^2.5.1"
     lodash "^4.17.13"
     source-map "^0.5.0"
@@ -241,10 +241,10 @@
     esutils "^2.0.2"
     js-tokens "^4.0.0"
 
-"@babel/node@7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/node/-/node-7.6.2.tgz#a94479f95ee2008342f4847346c8bb8ff2770f44"
-  integrity sha512-59UxvVtRpVpL5i0KTcw41FqLNPT/Jc9k/48Rq00wfN49lAIQeRKGwZ6xX1FWlCfcIGP+5l4rfZajORvmYkhfGg==
+"@babel/node@7.6.3":
+  version "7.6.3"
+  resolved "https://registry.yarnpkg.com/@babel/node/-/node-7.6.3.tgz#f175ab6718dde55431cbd4d9dee95f65c38be527"
+  integrity sha512-+nHje5AcE9TPlB/TRGYyOSQyTfhfU/WXniG6SkVf+V5+ibAjEqkH79lYdiEcytBTH4KeSf25IriySXs6TjaLjg==
   dependencies:
     "@babel/register" "^7.6.2"
     commander "^2.8.1"
@@ -254,10 +254,10 @@
     regenerator-runtime "^0.13.3"
     v8flags "^3.1.1"
 
-"@babel/parser@^7.1.0", "@babel/parser@^7.4.3", "@babel/parser@^7.6.0", "@babel/parser@^7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.6.2.tgz#205e9c95e16ba3b8b96090677a67c9d6075b70a1"
-  integrity sha512-mdFqWrSPCmikBoaBYMuBulzTIKuXVPtEISFbRRVNwMWpCms/hmE2kRq0bblUHaNRKrjRlmVbx1sDHmjmRgD2Xg==
+"@babel/parser@^7.1.0", "@babel/parser@^7.4.3", "@babel/parser@^7.6.0", "@babel/parser@^7.6.3", "@babel/parser@^7.6.4":
+  version "7.6.4"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.6.4.tgz#cb9b36a7482110282d5cb6dd424ec9262b473d81"
+  integrity sha512-D8RHPW5qd0Vbyo3qb+YjO5nvUVRTXFLQ/FsDxJU2Nqz4uB5EnUN0ZQSEYpvTIbRuttig1XbHWU5oMeQwQSAA+A==
 
 "@babel/plugin-proposal-async-generator-functions@^7.2.0":
   version "7.2.0"
@@ -382,10 +382,10 @@
   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"
@@ -507,10 +507,10 @@
     "@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"
 
@@ -614,10 +614,10 @@
     "@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"
@@ -635,7 +635,7 @@
     "@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"
@@ -650,7 +650,7 @@
     "@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"
@@ -663,7 +663,7 @@
     "@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"
@@ -698,25 +698,25 @@
     "@babel/parser" "^7.6.0"
     "@babel/types" "^7.6.0"
 
-"@babel/traverse@^7.1.0", "@babel/traverse@^7.4.3", "@babel/traverse@^7.4.4", "@babel/traverse@^7.5.5", "@babel/traverse@^7.6.2":
-  version "7.6.2"
-  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.6.2.tgz#b0e2bfd401d339ce0e6c05690206d1e11502ce2c"
-  integrity sha512-8fRE76xNwNttVEF2TwxJDGBLWthUkHWSldmfuBzVRmEDWOtu4XdINTgN7TDWzuLg4bbeIMLvfMFD9we5YcWkRQ==
+"@babel/traverse@^7.1.0", "@babel/traverse@^7.4.3", "@babel/traverse@^7.4.4", "@babel/traverse@^7.5.5", "@babel/traverse@^7.6.2", "@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" "^7.6.2"
+    "@babel/generator" "^7.6.3"
     "@babel/helper-function-name" "^7.1.0"
     "@babel/helper-split-export-declaration" "^7.4.4"
-    "@babel/parser" "^7.6.2"
-    "@babel/types" "^7.6.0"
+    "@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@^7.3.0", "@babel/types@^7.4.0", "@babel/types@^7.4.4", "@babel/types@^7.5.5", "@babel/types@^7.6.0":
-  version "7.6.1"
-  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.6.1.tgz#53abf3308add3ac2a2884d539151c57c4b3ac648"
-  integrity sha512-X7gdiuaCmA0uRjCmRtYJNAVCc/q+5xSgsfKJHqMN4iNLILX39677fJE1O40arPMh0TTtS9ItH67yre6c7k6t0g==
+"@babel/types@^7.0.0", "@babel/types@^7.2.0", "@babel/types@^7.3.0", "@babel/types@^7.4.0", "@babel/types@^7.4.4", "@babel/types@^7.5.5", "@babel/types@^7.6.0", "@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"