diff --git a/client/package.json b/client/package.json
index 5b0af96015..c46891ce15 100644
--- a/client/package.json
+++ b/client/package.json
@@ -47,6 +47,7 @@
     "cordova-plugin-splashscreen": "^6.0.0",
     "cordova-plugin-statusbar": "^2.2.3",
     "electron-updater": "^5.0.5",
+    "element-internals-polyfill": "^1.3.12",
     "fs-extra": "^11.2.0",
     "lit": "^2.2.2",
     "ShadowsocksConfig": "github:Jigsaw-Code/outline-shadowsocksconfig#v0.2.1",
diff --git a/client/src/www/ui_components/app-root.js b/client/src/www/ui_components/app-root.js
index ca9325cdf5..5f8745d700 100644
--- a/client/src/www/ui_components/app-root.js
+++ b/client/src/www/ui_components/app-root.js
@@ -14,6 +14,7 @@
   limitations under the License.
 */
 
+import 'element-internals-polyfill';
 import '@material/web/all.js';
 import '@polymer/polymer/polymer-legacy.js';
 import '@polymer/polymer/lib/legacy/polymer.dom.js';
diff --git a/package-lock.json b/package-lock.json
index 79cd9a234a..0a4a83b102 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -82,6 +82,7 @@
         "cordova-plugin-splashscreen": "^6.0.0",
         "cordova-plugin-statusbar": "^2.2.3",
         "electron-updater": "^5.0.5",
+        "element-internals-polyfill": "^1.3.12",
         "fs-extra": "^11.2.0",
         "lit": "^2.2.2",
         "ShadowsocksConfig": "github:Jigsaw-Code/outline-shadowsocksconfig#v0.2.1",
@@ -16315,6 +16316,11 @@
       "integrity": "sha512-84iSqGXoO+Ha16j8pRZ/L90vDMKX04QTYMTfYeE1WrjWaZXuchBehGUZEpNgx7JnmlrIHdnABmpjrQjhCnNldQ==",
       "dev": true
     },
+    "node_modules/element-internals-polyfill": {
+      "version": "1.3.12",
+      "resolved": "https://registry.npmjs.org/element-internals-polyfill/-/element-internals-polyfill-1.3.12.tgz",
+      "integrity": "sha512-KW1k+cMGwXlx3X9nqhgmuElAfR/c/ccFt0pG4KpwK++Mx9Y+mPExxJW+jgQnqux/NQrJejgOxxg4Naf3f6y67Q=="
+    },
     "node_modules/elementtree": {
       "version": "0.1.7",
       "dev": true,
@@ -40802,6 +40808,7 @@
         "electron": "19.1.9",
         "electron-builder": "^23.6.0",
         "electron-updater": "^5.0.5",
+        "element-internals-polyfill": "^1.3.12",
         "eslint": "^8.15.0",
         "eslint-import-resolver-typescript": "^3.4.0",
         "eslint-plugin-compat": "^4.0.2",
@@ -50181,6 +50188,11 @@
         }
       }
     },
+    "element-internals-polyfill": {
+      "version": "1.3.12",
+      "resolved": "https://registry.npmjs.org/element-internals-polyfill/-/element-internals-polyfill-1.3.12.tgz",
+      "integrity": "sha512-KW1k+cMGwXlx3X9nqhgmuElAfR/c/ccFt0pG4KpwK++Mx9Y+mPExxJW+jgQnqux/NQrJejgOxxg4Naf3f6y67Q=="
+    },
     "elementtree": {
       "version": "0.1.7",
       "dev": true,