diff --git a/web/package.json b/web/package.json
index ead6e119..ac34e1ae 100644
--- a/web/package.json
+++ b/web/package.json
@@ -14,12 +14,15 @@
     "test": "react-app-rewired test"
   },
   "dependencies": {
+    "@babel/polyfill": "^7.0.0",
     "react": "^16.5.2",
+    "react-app-polyfill": "^0.1.3",
     "react-art": "^16.5.2",
     "react-dom": "^16.5.2",
     "react-native-web": "^0.9.3",
     "react-navigation-tabs": "^0.8.4",
-    "react-scripts": "2.0.5"
+    "react-scripts": "2.0.5",
+    "resize-observer-polyfill": "^1.5.0"
   },
   "devDependencies": {
     "@types/jest": "^23.3.5",
@@ -37,7 +40,7 @@
   "browserslist": [
     ">0.2%",
     "not dead",
-    "not ie <= 11",
+    "not ie <= 9",
     "not op_mini all"
   ]
 }
diff --git a/web/src/index.tsx b/web/src/index.tsx
index 0d2c12a4..7d156480 100644
--- a/web/src/index.tsx
+++ b/web/src/index.tsx
@@ -1 +1,5 @@
+import '@babel/polyfill'
+import 'react-app-polyfill/ie9'
+import 'resize-observer-polyfill/dist/ResizeObserver.global'
+
 import '../../index.web.js'
diff --git a/web/yarn.lock b/web/yarn.lock
index fc9829f8..3f4d54aa 100644
--- a/web/yarn.lock
+++ b/web/yarn.lock
@@ -686,6 +686,14 @@
     "@babel/helper-regex" "^7.0.0"
     regexpu-core "^4.1.3"
 
+"@babel/polyfill@^7.0.0":
+  version "7.0.0"
+  resolved "https://registry.npmjs.org/@babel/polyfill/-/polyfill-7.0.0.tgz#c8ff65c9ec3be6a1ba10113ebd40e8750fb90bff"
+  integrity sha512-dnrMRkyyr74CRelJwvgnnSUDh2ge2NCTyHVwpOdvRMHtJUyxLtMAfhBN3s64pY41zdw0kgiLPh6S20eb1NcX6Q==
+  dependencies:
+    core-js "^2.5.7"
+    regenerator-runtime "^0.11.1"
+
 "@babel/preset-env@7.1.0", "@babel/preset-env@^7.0.0":
   version "7.1.0"
   resolved "https://registry.npmjs.org/@babel/preset-env/-/preset-env-7.1.0.tgz#e67ea5b0441cfeab1d6f41e9b5c79798800e8d11"
@@ -2518,7 +2526,7 @@ copy-descriptor@^0.1.0:
   resolved "https://registry.npmjs.org/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
   integrity sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=
 
-core-js@2.5.7, core-js@^2.4.0, core-js@^2.5.0:
+core-js@2.5.7, core-js@^2.4.0, core-js@^2.5.0, core-js@^2.5.7:
   version "2.5.7"
   resolved "https://registry.npmjs.org/core-js/-/core-js-2.5.7.tgz#f972608ff0cead68b841a16a932d0b183791814e"
   integrity sha512-RszJCAxg/PP6uzXVXL6BsxSXx/B05oJAQ2vkJRjyjrEcNVycaqOmNb5OTxZPE3xa5gwZduqza6L9JOCenh/Ecw==
@@ -8371,7 +8379,7 @@ regenerate@^1.2.1, regenerate@^1.4.0:
   resolved "https://registry.npmjs.org/regenerate/-/regenerate-1.4.0.tgz#4a856ec4b56e4077c557589cae85e7a4c8869a11"
   integrity sha512-1G6jJVDWrt0rK99kBjvEtziZNCICAuvIPkSiUFIQxVP06RCVpq3dmDo2oi6ABpYaDYaTRr67BEhL8r1wgEZZKg==
 
-regenerator-runtime@^0.11.0:
+regenerator-runtime@^0.11.0, regenerator-runtime@^0.11.1:
   version "0.11.1"
   resolved "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"
   integrity sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==
@@ -8576,6 +8584,11 @@ requires-port@^1.0.0:
   resolved "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz#925d2601d39ac485e091cf0da5c6e694dc3dcaff"
   integrity sha1-kl0mAdOaxIXgkc8NpcbmlNw9yv8=
 
+resize-observer-polyfill@^1.5.0:
+  version "1.5.0"
+  resolved "https://registry.npmjs.org/resize-observer-polyfill/-/resize-observer-polyfill-1.5.0.tgz#660ff1d9712a2382baa2cad450a4716209f9ca69"
+  integrity sha512-M2AelyJDVR/oLnToJLtuDJRBBWUGUvvGigj1411hXhAdyFWqMaqHp7TixW3FpiLuVaikIcR1QL+zqoJoZlOgpg==
+
 resolve-cwd@^2.0.0:
   version "2.0.0"
   resolved "https://registry.npmjs.org/resolve-cwd/-/resolve-cwd-2.0.0.tgz#00a9f7387556e27038eae232caa372a6a59b665a"