diff --git a/package.json b/package.json
index a506141802..ad313e735d 100644
--- a/package.json
+++ b/package.json
@@ -88,7 +88,7 @@
     "@formatjs/intl-locale": "^4.2.13",
     "@formatjs/intl-numberformat": "^9.1.2",
     "@formatjs/intl-pluralrules": "^6.1.2",
-    "@formatjs/intl-relativetimeformat": "^11.4.13",
+    "@formatjs/intl-relativetimeformat": "^12.1.2",
     "@reduxjs/toolkit": "^2.11.2",
     "@sentry/integrations": "^7.114.0",
     "@sentry/react": "^10.33.0",
diff --git a/pkg/webui/lib/components/with-locale.js b/pkg/webui/lib/components/with-locale.js
index fe1dfdf0c3..2545001df2 100644
--- a/pkg/webui/lib/components/with-locale.js
+++ b/pkg/webui/lib/components/with-locale.js
@@ -154,7 +154,9 @@ const WithLocale = ({ children }) => {
         if (!window.Intl.RelativeTimeFormat) {
           log('Polyfilling Intl.RelativeTimeFormat')
           await import(
-            /* webpackChunkName: "locale-date-time-format" */ '@formatjs/intl-relativetimeformat/polyfill'
+            /* webpackChunkName: "locale-date-time-format" */
+            // eslint-disable-next-line import/extensions -- package exports require explicit .js
+            '@formatjs/intl-relativetimeformat/polyfill.js'
           )
         }
 
diff --git a/yarn.lock b/yarn.lock
index 990c8bd217..4b5c8cdd53 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1914,13 +1914,13 @@
     decimal.js "^10.4.3"
     tslib "^2.8.0"
 
-"@formatjs/intl-relativetimeformat@^11.4.13":
-  version "11.4.13"
-  resolved "https://registry.yarnpkg.com/@formatjs/intl-relativetimeformat/-/intl-relativetimeformat-11.4.13.tgz#f77839f2e87b1b0641e8ed72e673b9386f5df79a"
-  integrity sha512-fNs6cpz9zIUEgTlE3kPSEyRfslxeMG19dT7sLz2C6U7Jxkx8xK/IH1ImZzCeqd6JlqE81O7uNW4oZTb1pz8lUw==
+"@formatjs/intl-relativetimeformat@^12.1.2":
+  version "12.1.2"
+  resolved "https://registry.yarnpkg.com/@formatjs/intl-relativetimeformat/-/intl-relativetimeformat-12.1.2.tgz#188b088b04fa6309e47374526593529be737b770"
+  integrity sha512-bl5yZD5YFYo4CvGKRVGwuUDYO0LifLHQR5CG6EV29Vw8/9MVWfrkkFM5Al4Ec+Prq2pzMnu++1Q+oQO1Anjn6A==
   dependencies:
-    "@formatjs/ecma402-abstract" "2.3.6"
-    "@formatjs/intl-localematcher" "0.6.2"
+    "@formatjs/ecma402-abstract" "3.0.8"
+    "@formatjs/intl-localematcher" "0.7.5"
     tslib "^2.8.0"
 
 "@formatjs/intl@3.1.8":