diff --git a/package.json b/package.json
index e49aced15f..f123027cb5 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "@fontsource/noto-sans-sc": "^4.2.1",
     "blurhash": "^1.1.3",
     "classlist.js": "https://github.com/eligrey/classList.js/archive/1.2.20180112.tar.gz",
-    "core-js": "^3.8.3",
+    "core-js": "^3.9.0",
     "date-fns": "^2.17.0",
     "epubjs": "^0.3.85",
     "fast-text-encoding": "^1.0.3",
diff --git a/yarn.lock b/yarn.lock
index 2ce754c43c..a781071803 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2252,10 +2252,10 @@ core-js-compat@^3.8.0:
     browserslist "^4.15.0"
     semver "7.0.0"
 
-core-js@^3.6.5, core-js@^3.8.3:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.8.3.tgz#c21906e1f14f3689f93abcc6e26883550dd92dd0"
-  integrity sha512-KPYXeVZYemC2TkNEkX/01I+7yd+nX3KddKwZ1Ww7SKWdI2wQprSgLmrTddT8nw92AjEklTsPBoSdQBhbI1bQ6Q==
+core-js@^3.6.5, core-js@^3.9.0:
+  version "3.9.0"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.9.0.tgz#790b1bb11553a2272b36e2625c7179db345492f8"
+  integrity sha512-PyFBJaLq93FlyYdsndE5VaueA9K5cNB7CGzeCj191YYLhkQM0gdZR2SKihM70oF0wdqKSKClv/tEBOpoRmdOVQ==
 
 core-util-is@~1.0.0:
   version "1.0.2"