diff --git a/site/dev-server.js b/site/dev-server.js
index 57e3fe1db..f9db9317e 100644
--- a/site/dev-server.js
+++ b/site/dev-server.js
@@ -1,6 +1,7 @@
 const express = require('express')
 const webpack = require('webpack')
 const webpackDevMiddleware = require('webpack-dev-middleware')
+const { createProxyMiddleware } = require('http-proxy-middleware')
 
 const app = express()
 const config = require('./webpack.dev.js')
@@ -22,6 +23,14 @@ app.get('/', function (req, res) {
 	</ul>`)
 })
 
+app.use(
+	createProxyMiddleware('/polyfill.io', {
+		target: 'https://polyfill.io',
+		changeOrigin: true,
+		pathRewrite: { '^/polyfill.io': '' },
+	})
+)
+
 app.use(
 	history({
 		rewrites: ['infrance', 'mon-entreprise', 'publicodes'].map(rewrite),
diff --git a/site/package.json b/site/package.json
index 2d4b8d310..a76a2fdeb 100644
--- a/site/package.json
+++ b/site/package.json
@@ -46,7 +46,6 @@
 		"@babel/runtime": "^7.3.4",
 		"@icons/material": "^0.4.1",
 		"@internationalized/number": "^3.0.3",
-		"@juggle/resize-observer": "^3.3.1",
 		"@mui/material": "^5.0.4",
 		"@mui/styled-engine": "npm:@mui/styled-engine-sc@latest",
 		"@react-aria/button": "^3.3.4",
@@ -163,6 +162,7 @@
 		"file-loader": "^1.1.11",
 		"html-loader": "^0.5.5",
 		"html-webpack-plugin": "^3.2.0",
+		"http-proxy-middleware": "^2.0.2",
 		"http-server": "^0.11.1",
 		"i18next-parser": "^3.3.0",
 		"isomorphic-fetch": "^2.2.1",
diff --git a/yarn.lock b/yarn.lock
index 1922ba061..274f583e5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1455,11 +1455,6 @@
     "@types/yargs" "^16.0.0"
     chalk "^4.0.0"
 
-"@juggle/resize-observer@^3.3.1":
-  version "3.3.1"
-  resolved "https://registry.yarnpkg.com/@juggle/resize-observer/-/resize-observer-3.3.1.tgz#b50a781709c81e10701004214340f25475a171a0"
-  integrity sha512-zMM9Ds+SawiUkakS7y94Ymqx+S0ORzpG3frZirN3l+UlXUmSUR7hF4wxCVqW+ei94JzV5kt0uXBcoOEAuiydrw==
-
 "@mui/base@5.0.0-alpha.58":
   version "5.0.0-alpha.58"
   resolved "https://registry.npmjs.org/@mui/base/-/base-5.0.0-alpha.58.tgz"
@@ -2561,6 +2556,13 @@
     "@types/react" "*"
     hoist-non-react-statics "^3.3.0"
 
+"@types/http-proxy@^1.17.8":
+  version "1.17.8"
+  resolved "https://registry.yarnpkg.com/@types/http-proxy/-/http-proxy-1.17.8.tgz#968c66903e7e42b483608030ee85800f22d03f55"
+  integrity sha512-5kPLG5BKpWYkw/LVOGWpiq3nEVqxiN32rTgI53Sk12/xHFQ2rG3ehI9IO+O3W2QoKeyB92dJkoka8SUm6BX1pA==
+  dependencies:
+    "@types/node" "*"
+
 "@types/iframe-resizer@^3.5.7":
   version "3.5.9"
   resolved "https://registry.npmjs.org/@types/iframe-resizer/-/iframe-resizer-3.5.9.tgz"
@@ -7895,7 +7897,18 @@ http-proxy-middleware@^0.18.0:
     lodash "^4.17.5"
     micromatch "^3.1.9"
 
-http-proxy@^1.16.2, http-proxy@^1.8.1:
+http-proxy-middleware@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/http-proxy-middleware/-/http-proxy-middleware-2.0.2.tgz#94d7593790aad6b3de48164f13792262f656c332"
+  integrity sha512-XtmDN5w+vdFTBZaYhdJAbMqn0DP/EhkUaAeo963mojwpKMMbw6nivtFKw07D7DDOH745L5k0VL0P8KRYNEVF/g==
+  dependencies:
+    "@types/http-proxy" "^1.17.8"
+    http-proxy "^1.18.1"
+    is-glob "^4.0.1"
+    is-plain-obj "^3.0.0"
+    micromatch "^4.0.2"
+
+http-proxy@^1.16.2, http-proxy@^1.18.1, http-proxy@^1.8.1:
   version "1.18.1"
   resolved "https://registry.npmjs.org/http-proxy/-/http-proxy-1.18.1.tgz"
   integrity sha512-7mz/721AbnJwIVbnaSv1Cz3Am0ZLT/UBwkC92VlxhXv/k/BBQfM2fXElQNC27BVGr0uwUpplYPQM9LnaBMR5NQ==
@@ -8483,6 +8496,11 @@ is-plain-obj@^1.0.0, is-plain-obj@^1.1.0:
   resolved "https://registry.npmjs.org/is-plain-obj/-/is-plain-obj-1.1.0.tgz"
   integrity sha1-caUMhCnfync8kqOQpKA7OfzVHT4=
 
+is-plain-obj@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-3.0.0.tgz#af6f2ea14ac5a646183a5bbdb5baabbc156ad9d7"
+  integrity sha512-gwsOE28k+23GP1B6vFl1oVh/WOzmawBrKwo5Ev6wMKzPkaXaCDIQKzLnvsA42DRlbVTWorkgTKIviAKCWkfUwA==
+
 is-plain-object@^2.0.3, is-plain-object@^2.0.4:
   version "2.0.4"
   resolved "https://registry.npmjs.org/is-plain-object/-/is-plain-object-2.0.4.tgz"
@@ -9835,7 +9853,7 @@ micromatch@^3.0.4, micromatch@^3.1.10, micromatch@^3.1.4, micromatch@^3.1.9:
     snapdragon "^0.8.1"
     to-regex "^3.0.2"
 
-micromatch@^4.0.4:
+micromatch@^4.0.2, micromatch@^4.0.4:
   version "4.0.4"
   resolved "https://registry.npmjs.org/micromatch/-/micromatch-4.0.4.tgz"
   integrity sha512-pRmzw/XUcwXGpD9aI9q/0XOwLNygjETJ8y0ao0wdqprrzDa4YnxLcz7fQRZr8voh8V10kGhABbNcHVk5wHgWwg==