diff --git a/.babelrc b/.babelrc
index 068fbdf..03f9ee3 100644
--- a/.babelrc
+++ b/.babelrc
@@ -1,6 +1,12 @@
 {
   "presets": [
-    ["@babel/preset-env", { modules: false }],
+    ["@babel/preset-env", {
+      modules: false,
+      useBuiltIns: "usage",
+      targets: {
+        browsers: ["iOS 5"]
+      }
+    }],
     "@babel/preset-react",
     "@babel/preset-flow"
   ],
diff --git a/.browserslistrc b/.browserslistrc
deleted file mode 100644
index 26ff3d0..0000000
--- a/.browserslistrc
+++ /dev/null
@@ -1,7 +0,0 @@
-[production staging]
-> 5%
-iOS 5
-
-[development]
-last 1 chrome version
-last 1 firefox version
diff --git a/package.json b/package.json
index e723932..410ee99 100644
--- a/package.json
+++ b/package.json
@@ -27,13 +27,14 @@
   "devDependencies": {
     "@babel/cli": "^7.0.0-rc.1",
     "@babel/core": "^7.0.0-rc.1",
-    "babel-eslint": "^8.0.1",
-    "babel-loader": "^8.0.0-beta",
     "@babel/plugin-proposal-class-properties": "^7.0.0-rc.1",
     "@babel/plugin-proposal-object-rest-spread": "^7.0.0-rc.1",
+    "@babel/polyfill": "^7.0.0-rc.1",
     "@babel/preset-env": "^7.0.0-rc.1",
-    "@babel/preset-react": "^7.0.0-rc.1",
     "@babel/preset-flow": "^7.0.0-rc.1",
+    "@babel/preset-react": "^7.0.0-rc.1",
+    "babel-eslint": "^8.0.1",
+    "babel-loader": "^8.0.0-beta",
     "clean-webpack-plugin": "^0.1.18",
     "css-loader": "^1.0.0",
     "eslint": "^5.0.1",
diff --git a/yarn.lock b/yarn.lock
index 81557d8..cb06c6a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -562,6 +562,13 @@
     "@babel/helper-regex" "7.0.0-rc.1"
     regexpu-core "^4.1.3"
 
+"@babel/polyfill@^7.0.0-rc.1":
+  version "7.0.0-rc.1"
+  resolved "https://registry.yarnpkg.com/@babel/polyfill/-/polyfill-7.0.0-rc.1.tgz#c78e17e64c42cd6a2f5d8edf0f20e18213c0d74d"
+  dependencies:
+    core-js "^2.5.7"
+    regenerator-runtime "^0.11.1"
+
 "@babel/preset-env@^7.0.0-rc.1":
   version "7.0.0-rc.1"
   resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.0.0-rc.1.tgz#cb87a82fd3e44005219cd9f1cb3e9fdba907aae5"
@@ -4880,7 +4887,7 @@ regenerator-runtime@^0.10.5:
   version "0.10.5"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz#336c3efc1220adcedda2c9fab67b5a7955a33658"
 
-regenerator-runtime@^0.11.0:
+regenerator-runtime@^0.11.0, regenerator-runtime@^0.11.1:
   version "0.11.1"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"