diff --git a/package.json b/package.json
index 5adb53dd..6d56a45b 100644
--- a/package.json
+++ b/package.json
@@ -88,6 +88,7 @@
     "rollup-plugin-babel": "^4.4.0",
     "rollup-plugin-terser": "^7.0.2",
     "rtl-detect": "^1.0.3",
+    "safari-14-idb-fix": "^1.0.2",
     "sapper": "nolanlawson/sapper#for-pinafore-25",
     "sass": "^1.32.13",
     "stringz": "^2.1.0",
diff --git a/src/client.js b/src/client.js
index 2026e1fb..2383e638 100644
--- a/src/client.js
+++ b/src/client.js
@@ -6,10 +6,9 @@ import './routes/_utils/forceOnline'
 import { mark, stop } from './routes/_utils/marks'
 import { loadPolyfills } from './routes/_utils/polyfills/loadPolyfills'
 import { loadNonCriticalPolyfills } from './routes/_utils/polyfills/loadNonCriticalPolyfills'
+import idbReady from 'safari-14-idb-fix'
 
-mark('loadPolyfills')
-loadPolyfills().then(() => {
-  stop('loadPolyfills')
+Promise.all([idbReady(), loadPolyfills()]).then(() => {
   mark('sapperStart')
   sapper.start({ target: document.querySelector('#sapper') })
   stop('sapperStart')
diff --git a/src/routes/_utils/polyfills/loadPolyfills.js b/src/routes/_utils/polyfills/loadPolyfills.js
index 28a8cb63..7f572d2e 100644
--- a/src/routes/_utils/polyfills/loadPolyfills.js
+++ b/src/routes/_utils/polyfills/loadPolyfills.js
@@ -3,6 +3,7 @@ import {
   importIntlLocale, importIntlPluralRules, importIntlRelativeTimeFormat,
   importRequestIdleCallback
 } from './asyncPolyfills'
+import { mark, stop } from '../marks'
 
 async function loadIntlPolyfillsIfNecessary () {
   // Have to chain these so that they load in the proper order.
@@ -20,9 +21,11 @@ async function loadIntlPolyfillsIfNecessary () {
   ])
 }
 
-export function loadPolyfills () {
-  return Promise.all([
+export async function loadPolyfills () {
+  mark('loadPolyfills')
+  await Promise.all([
     typeof requestIdleCallback !== 'function' && importRequestIdleCallback(),
     loadIntlPolyfillsIfNecessary()
   ])
+  stop('loadPolyfills')
 }
diff --git a/yarn.lock b/yarn.lock
index a8ed7e61..02e60ef9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5983,6 +5983,11 @@ rxjs@^6.6.7:
   dependencies:
     tslib "^1.9.0"
 
+safari-14-idb-fix@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/safari-14-idb-fix/-/safari-14-idb-fix-1.0.2.tgz#c489feca93bc71628019ff490487370255316b86"
+  integrity sha512-RvZsa8kntL5qOnLdJbHfF7oAw596M/mRjpHXpASGu1/Rpn4SnI2IemHz3oUeK0chngZIcwyBXLSYBLrpIeE42A==
+
 safe-buffer@5.1.2, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"