diff --git a/packages/react-scripts/config/webpack.config.dev.js b/packages/react-scripts/config/webpack.config.dev.js
index 3ac7395e63a..2f88528e112 100644
--- a/packages/react-scripts/config/webpack.config.dev.js
+++ b/packages/react-scripts/config/webpack.config.dev.js
@@ -209,6 +209,8 @@ module.exports = {
                         'last 4 versions',
                         'Firefox ESR',
                         'not ie < 9', // React doesn't support IE8 anyway
+                        'iOS >= 8',
+                        'android >= 4.0'
                       ],
                       flexbox: 'no-2009',
                     }),
diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
index d80351ec63f..5acdd0faa6e 100644
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ b/packages/react-scripts/config/webpack.config.prod.js
@@ -223,6 +223,8 @@ module.exports = {
                               'last 4 versions',
                               'Firefox ESR',
                               'not ie < 9', // React doesn't support IE8 anyway
+                              'iOS >= 8',
+                              'android >= 4.0'
                             ],
                             flexbox: 'no-2009',
                           }),