diff --git a/package.json b/package.json
index e9471a8ebccc..0c500f7e7505 100644
--- a/package.json
+++ b/package.json
@@ -142,6 +142,7 @@
   "devDependencies": {
     "@babel/core": "^7.22.9",
     "@babel/eslint-parser": "^7.22.9",
+    "@babel/plugin-proposal-private-property-in-object": "^7.21.11",
     "@babel/preset-env": "^7.22.9",
     "@mdn/dinocons": "^0.5.5",
     "@mdn/minimalist": "^2.0.4",
diff --git a/yarn.lock b/yarn.lock
index 3ce93977deb7..eec47d35c1e3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -509,6 +509,16 @@
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-private-property-in-object/-/plugin-proposal-private-property-in-object-7.21.0-placeholder-for-preset-env.2.tgz#7844f9289546efa9febac2de4cfe358a050bd703"
   integrity sha512-SOSkfJDddaM7mak6cPEpswyTRnuRltl429hMraQEglW+OkovnCzsiszTmsrlY//qLFjCpQDFRvjdm2wA5pPm9w==
 
+"@babel/plugin-proposal-private-property-in-object@^7.21.11":
+  version "7.21.11"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-private-property-in-object/-/plugin-proposal-private-property-in-object-7.21.11.tgz#69d597086b6760c4126525cfa154f34631ff272c"
+  integrity sha512-0QZ8qP/3RLDVBwBFoWAwCtgcDZJVwA5LUJRZU8x2YFfKNuFq161wK3cuGrALu5yiPu+vzwTAg/sMWVNeWeNyaw==
+  dependencies:
+    "@babel/helper-annotate-as-pure" "^7.18.6"
+    "@babel/helper-create-class-features-plugin" "^7.21.0"
+    "@babel/helper-plugin-utils" "^7.20.2"
+    "@babel/plugin-syntax-private-property-in-object" "^7.14.5"
+
 "@babel/plugin-proposal-unicode-property-regex@^7.4.4":
   version "7.18.6"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-unicode-property-regex/-/plugin-proposal-unicode-property-regex-7.18.6.tgz#af613d2cd5e643643b65cded64207b15c85cb78e"