diff --git a/package-lock.json b/package-lock.json
index 51981b41..597c93a8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -207,9 +207,9 @@
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-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
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+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
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@@ -507,6 +507,13 @@
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         "mkdirp": "^0.5.1",
         "source-map-support": "^0.4.15"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.11.tgz",
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+        }
       }
     },
     "babel-runtime": {
@@ -516,6 +523,13 @@
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         "core-js": "^2.4.0",
         "regenerator-runtime": "^0.11.0"
+      },
+      "dependencies": {
+        "core-js": {
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+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.11.tgz",
+          "integrity": "sha512-5wjnpaT/3dV+XB4borEsnAYQchn00XSgTAWKDkEqv+K8KevjbzmofK6hfJ9TZIlpj2N0xQpazy7PiRQiWHqzWg=="
+        }
       }
     },
     "babel-template": {
@@ -649,9 +663,9 @@
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-      "version": "2.5.7",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.5.7.tgz",
-      "integrity": "sha512-RszJCAxg/PP6uzXVXL6BsxSXx/B05oJAQ2vkJRjyjrEcNVycaqOmNb5OTxZPE3xa5gwZduqza6L9JOCenh/Ecw=="
+      "version": "3.6.5",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.6.5.tgz",
+      "integrity": "sha512-vZVEEwZoIsI+vPEuoF9Iqf5H7/M3eeQqWlQnYa8FSKKePuYTf5MWnxb5SDAzCa60b3JBRS5g9b+Dq7b1y/RCrA=="
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@@ -944,10 +958,21 @@
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-      "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-1.3.1.tgz",
-      "integrity": "sha512-Z7YjnIldX+2XMcjr7ZkgEsOj/bREONV60qYeB/bjMAqqqZ4zxKyWX+BOUkdmRmA9riiIPVvo5x86m5elviOk0Q==",
-      "dev": true
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-1.4.3.tgz",
+      "integrity": "sha512-fbBN5W2xdY45KulGXmLHZ3c3FHfVYmKg0IrAKGOkT/464PQsx2UeIzfz1RmEci+KLm1bBaAzZAh8+/E+XAeZ8Q==",
+      "dev": true,
+      "requires": {
+        "eslint-visitor-keys": "^1.1.0"
+      },
+      "dependencies": {
+        "eslint-visitor-keys": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz",
+          "integrity": "sha512-8y9YjtM1JBJU/A9Kc+SbaOV4y29sSWckBwMHa+FGtVj5gN/sbnKDf6xJUl+8g7FAij9LVaP8C24DUiH/f/2Z9A==",
+          "dev": true
+        }
+      }
     },
     "eslint-visitor-keys": {
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@@ -1442,9 +1467,9 @@
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-      "version": "4.17.11",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
-      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
+      "version": "4.17.15",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+      "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
     },
     "loose-envify": {
       "version": "1.4.0",
@@ -1468,17 +1493,19 @@
         "brace-expansion": "^1.1.7"
       }
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-    "minimist": {
-      "version": "0.0.8",
-      "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
-    },
     "mkdirp": {
-      "version": "0.5.1",
-      "resolved": "http://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "version": "0.5.5",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+      "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
       "requires": {
-        "minimist": "0.0.8"
+        "minimist": "^1.2.5"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.5",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
+        }
       }
     },
     "ms": {
@@ -2004,9 +2031,9 @@
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     "yargs-parser": {
-      "version": "13.1.0",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.0.tgz",
-      "integrity": "sha512-Yq+32PrijHRri0vVKQEm+ys8mbqWjLiwQkMFNXEENutzLPP0bE4Lcd4iA3OQY5HF+GD3xXxf0MEHb8E4/SA3AA==",
+      "version": "13.1.2",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
+      "integrity": "sha512-3lbsNRf/j+A4QuSZfDRA7HRSfWrzO0YjqTJd5kjAq37Zep1CEgaYmrH9Q3GwPiB9cHyd1Y1UwggGhJGoxipbzg==",
       "requires": {
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
diff --git a/package.json b/package.json
index cd1ffb66..d6bbc22e 100644
--- a/package.json
+++ b/package.json
@@ -82,6 +82,7 @@
     "babel-plugin-transform-flow-strip-types": "^6.22.0",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-plugin-transform-react-jsx": "^6.24.1",
+    "core-js": "^3.6.5",
     "etch": "0.14.0",
     "etch-octicon": "^2.0.0",
     "fs-extra": "^8.0.1",