diff --git a/.yarn-offline-mirror/browserslist-4.13.0.tgz b/.yarn-offline-mirror/browserslist-4.13.0.tgz
deleted file mode 100644
index d61ec5d..0000000
Binary files a/.yarn-offline-mirror/browserslist-4.13.0.tgz and /dev/null differ
diff --git a/.yarn-offline-mirror/browserslist-4.16.0.tgz b/.yarn-offline-mirror/browserslist-4.16.0.tgz
new file mode 100644
index 0000000..9429e20
Binary files /dev/null and b/.yarn-offline-mirror/browserslist-4.16.0.tgz differ
diff --git a/.yarn-offline-mirror/caniuse-lite-1.0.30001105.tgz b/.yarn-offline-mirror/caniuse-lite-1.0.30001105.tgz
deleted file mode 100644
index 11d0655..0000000
Binary files a/.yarn-offline-mirror/caniuse-lite-1.0.30001105.tgz and /dev/null differ
diff --git a/.yarn-offline-mirror/caniuse-lite-1.0.30001165.tgz b/.yarn-offline-mirror/caniuse-lite-1.0.30001165.tgz
new file mode 100644
index 0000000..b7e2717
Binary files /dev/null and b/.yarn-offline-mirror/caniuse-lite-1.0.30001165.tgz differ
diff --git a/.yarn-offline-mirror/colorette-1.2.1.tgz b/.yarn-offline-mirror/colorette-1.2.1.tgz
new file mode 100644
index 0000000..93dab57
Binary files /dev/null and b/.yarn-offline-mirror/colorette-1.2.1.tgz differ
diff --git a/.yarn-offline-mirror/electron-to-chromium-1.3.509.tgz b/.yarn-offline-mirror/electron-to-chromium-1.3.509.tgz
deleted file mode 100644
index 05ef04e..0000000
Binary files a/.yarn-offline-mirror/electron-to-chromium-1.3.509.tgz and /dev/null differ
diff --git a/.yarn-offline-mirror/electron-to-chromium-1.3.621.tgz b/.yarn-offline-mirror/electron-to-chromium-1.3.621.tgz
new file mode 100644
index 0000000..74c6757
Binary files /dev/null and b/.yarn-offline-mirror/electron-to-chromium-1.3.621.tgz differ
diff --git a/.yarn-offline-mirror/escalade-3.0.2.tgz b/.yarn-offline-mirror/escalade-3.0.2.tgz
deleted file mode 100644
index f926238..0000000
Binary files a/.yarn-offline-mirror/escalade-3.0.2.tgz and /dev/null differ
diff --git a/.yarn-offline-mirror/escalade-3.1.1.tgz b/.yarn-offline-mirror/escalade-3.1.1.tgz
new file mode 100644
index 0000000..56df047
Binary files /dev/null and b/.yarn-offline-mirror/escalade-3.1.1.tgz differ
diff --git a/.yarn-offline-mirror/node-releases-1.1.60.tgz b/.yarn-offline-mirror/node-releases-1.1.60.tgz
deleted file mode 100644
index ac0cb2c..0000000
Binary files a/.yarn-offline-mirror/node-releases-1.1.60.tgz and /dev/null differ
diff --git a/.yarn-offline-mirror/node-releases-1.1.67.tgz b/.yarn-offline-mirror/node-releases-1.1.67.tgz
new file mode 100644
index 0000000..a230488
Binary files /dev/null and b/.yarn-offline-mirror/node-releases-1.1.67.tgz differ
diff --git a/src/defaults.ts b/src/defaults.ts
index df8a901..f666982 100644
--- a/src/defaults.ts
+++ b/src/defaults.ts
@@ -19,18 +19,11 @@ export const DEFAULT_BABEL_PLUGINS: string[] = [
 export const DEFAULT_MODERN_BROWSERS = [
   // The last two versions of each browser, excluding versions
   // that don't support <script type="module">.
-  'last 2 Chrome versions', 'not Chrome < 60',
-  'last 2 Safari versions', 'not Safari < 10.1',
-  'last 2 iOS versions', 'not iOS < 10.3',
-  'last 2 Firefox versions', 'not Firefox < 54',
-  'last 2 Edge versions', 'not Edge < 15',
+  'browserslist config and supports es6-module',
 ]
 
 export const DEFAULT_LEGACY_BROWSERS = [
-  '> 1%',
-  'last 2 versions',
-  'Firefox ESR',
-  'IE 11',
+  'browserslist config and not supports es6-module',
 ]
 
 export const DEFAULT_BROWSERS: { [profile: string]: string[] } = {
diff --git a/yarn.lock b/yarn.lock
index 4ef0f8c..8fc0eb6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2232,14 +2232,15 @@ browserify-zlib@^0.2.0:
     pako "~1.0.5"
 
 browserslist@^4.12.0, browserslist@^4.8.5:
-  version "4.13.0"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.13.0.tgz#42556cba011e1b0a2775b611cba6a8eca18e940d"
-  integrity sha512-MINatJ5ZNrLnQ6blGvePd/QOz9Xtu+Ne+x29iQSCHfkU5BugKVJwZKn/iiL8UbpIpa3JhviKjz+XxMo0m2caFQ==
+  version "4.16.0"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.0.tgz#410277627500be3cb28a1bfe037586fbedf9488b"
+  integrity sha512-/j6k8R0p3nxOC6kx5JGAxsnhc9ixaWJfYc+TNTzxg6+ARaESAvQGV7h0uNOB4t+pLQJZWzcrMxXOxjgsCj3dqQ==
   dependencies:
-    caniuse-lite "^1.0.30001093"
-    electron-to-chromium "^1.3.488"
-    escalade "^3.0.1"
-    node-releases "^1.1.58"
+    caniuse-lite "^1.0.30001165"
+    colorette "^1.2.1"
+    electron-to-chromium "^1.3.621"
+    escalade "^3.1.1"
+    node-releases "^1.1.67"
 
 browserstack-local@^1.4.5:
   version "1.4.5"
@@ -2384,10 +2385,10 @@ camelcase@^6.0.0:
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-6.0.0.tgz#5259f7c30e35e278f1bdc2a4d91230b37cad981e"
   integrity sha512-8KMDF1Vz2gzOq54ONPJS65IvTUaB1cHJ2DMM7MbPmLZljDH1qpzzLsWdiN9pHh6qvkRVDTi/07+eNGch/oLU4w==
 
-caniuse-lite@^1.0.30001093:
-  version "1.0.30001105"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001105.tgz#d2cb0b31e5cf2f3ce845033b61c5c01566549abf"
-  integrity sha512-JupOe6+dGMr7E20siZHIZQwYqrllxotAhiaej96y6x00b/48rPt42o+SzOSCPbrpsDWvRja40Hwrj0g0q6LZJg==
+caniuse-lite@^1.0.30001165:
+  version "1.0.30001165"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001165.tgz#32955490d2f60290bb186bb754f2981917fa744f"
+  integrity sha512-8cEsSMwXfx7lWSUMA2s08z9dIgsnR5NAqjXP23stdsU3AUWkCr/rr4s4OFtHXn5XXr6+7kam3QFVoYyXNPdJPA==
 
 caseless@~0.12.0:
   version "0.12.0"
@@ -2602,6 +2603,11 @@ color-name@1.1.3:
   resolved "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
   integrity sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=
 
+colorette@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.1.tgz#4d0b921325c14faf92633086a536db6e89564b1b"
+  integrity sha512-puCDz0CzydiSYOrnXpz/PKd69zRrribezjtE9yd4zvytoRc8+RY/KJPvtPFKZS3E3wP6neGyMe0vOTlHO5L3Pw==
+
 colors@1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/colors/-/colors-1.4.0.tgz#c50491479d4c1bdaed2c9ced32cf7c7dc2360f78"
@@ -3299,10 +3305,10 @@ ee-first@1.1.1:
   resolved "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
   integrity sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=
 
-electron-to-chromium@^1.3.488:
-  version "1.3.509"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.509.tgz#830fcb89cd66dc2984d18d794973b99e3f00584c"
-  integrity sha512-cN4lkjNRuTG8rtAqTOVgwpecEC2kbKA04PG6YijcKGHK/kD0xLjiqExcAOmLUwtXZRF8cBeam2I0VZcih919Ug==
+electron-to-chromium@^1.3.621:
+  version "1.3.621"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.621.tgz#0bbe2100ef0b28f88d0b1101fbdf433312f69be0"
+  integrity sha512-FeIuBzArONbAmKmZIsZIFGu/Gc9AVGlVeVbhCq+G2YIl6QkT0TDn2HKN/FMf1btXEB9kEmIuQf3/lBTVAbmFOg==
 
 elliptic@^6.0.0:
   version "6.5.0"
@@ -3420,10 +3426,10 @@ es6-promisify@^5.0.0:
   dependencies:
     es6-promise "^4.0.3"
 
-escalade@^3.0.1:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.0.2.tgz#6a580d70edb87880f22b4c91d0d56078df6962c4"
-  integrity sha512-gPYAU37hYCUhW5euPeR+Y74F7BL+IBsV93j5cvGriSaD1aG6MGsqsV1yamRdrWrb2j3aiZvb0X+UBOWpx3JWtQ==
+escalade@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.1.1.tgz#d8cfdc7000965c5a0174b4a82eaa5c0552742e40"
+  integrity sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==
 
 escape-html@~1.0.3:
   version "1.0.3"
@@ -5935,10 +5941,10 @@ node-pre-gyp@^0.12.0:
     semver "^5.3.0"
     tar "^4"
 
-node-releases@^1.1.58:
-  version "1.1.60"
-  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.60.tgz#6948bdfce8286f0b5d0e5a88e8384e954dfe7084"
-  integrity sha512-gsO4vjEdQaTusZAEebUWp2a5d7dF5DYoIpDG7WySnk7BuZDW+GPpHXoXXuYawRBr/9t5q54tirPz79kFIWg4dA==
+node-releases@^1.1.67:
+  version "1.1.67"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.67.tgz#28ebfcccd0baa6aad8e8d4d8fe4cbc49ae239c12"
+  integrity sha512-V5QF9noGFl3EymEwUYzO+3NTDpGfQB4ve6Qfnzf3UNydMhjQRVPR1DZTuvWiLzaFJYw2fmDwAfnRNEVb64hSIg==
 
 node-sass@^4.14.1:
   version "4.14.1"