diff --git a/packages/babel-standalone/package.json b/packages/babel-standalone/package.json
index a95c4a5d0e24..7c59d3a33a07 100644
--- a/packages/babel-standalone/package.json
+++ b/packages/babel-standalone/package.json
@@ -32,6 +32,7 @@
     "@babel/plugin-proposal-optional-chaining": "^7.9.0",
     "@babel/plugin-proposal-pipeline-operator": "^7.8.3",
     "@babel/plugin-proposal-private-methods": "^7.8.3",
+    "@babel/plugin-proposal-private-property-in-object": "^7.8.3",
     "@babel/plugin-proposal-throw-expressions": "^7.8.3",
     "@babel/plugin-proposal-unicode-property-regex": "^7.8.8",
     "@babel/plugin-syntax-async-generators": "^7.8.0",
diff --git a/packages/babel-standalone/scripts/pluginConfig.json b/packages/babel-standalone/scripts/pluginConfig.json
index 856d0869b5e5..f764567be97d 100644
--- a/packages/babel-standalone/scripts/pluginConfig.json
+++ b/packages/babel-standalone/scripts/pluginConfig.json
@@ -34,6 +34,7 @@
   "proposal-optional-chaining",
   "proposal-pipeline-operator",
   "proposal-private-methods",
+  "proposal-private-property-in-object",
   "proposal-throw-expressions",
   "proposal-unicode-property-regex",
   "transform-async-to-generator",
diff --git a/packages/babel-standalone/src/generated/plugins.js b/packages/babel-standalone/src/generated/plugins.js
index 0b55279003db..4269a01b71cd 100644
--- a/packages/babel-standalone/src/generated/plugins.js
+++ b/packages/babel-standalone/src/generated/plugins.js
@@ -38,6 +38,7 @@ import proposalOptionalCatchBinding from "@babel/plugin-proposal-optional-catch-
 import proposalOptionalChaining from "@babel/plugin-proposal-optional-chaining";
 import proposalPipelineOperator from "@babel/plugin-proposal-pipeline-operator";
 import proposalPrivateMethods from "@babel/plugin-proposal-private-methods";
+import proposalPrivatePropertyInObject from "@babel/plugin-proposal-private-property-in-object";
 import proposalThrowExpressions from "@babel/plugin-proposal-throw-expressions";
 import proposalUnicodePropertyRegex from "@babel/plugin-proposal-unicode-property-regex";
 import transformAsyncToGenerator from "@babel/plugin-transform-async-to-generator";
@@ -127,6 +128,7 @@ export {
   proposalOptionalChaining,
   proposalPipelineOperator,
   proposalPrivateMethods,
+  proposalPrivatePropertyInObject,
   proposalThrowExpressions,
   proposalUnicodePropertyRegex,
   transformAsyncToGenerator,
@@ -217,6 +219,7 @@ export const all = {
   "proposal-optional-chaining": proposalOptionalChaining,
   "proposal-pipeline-operator": proposalPipelineOperator,
   "proposal-private-methods": proposalPrivateMethods,
+  "proposal-private-property-in-object": proposalPrivatePropertyInObject,
   "proposal-throw-expressions": proposalThrowExpressions,
   "proposal-unicode-property-regex": proposalUnicodePropertyRegex,
   "transform-async-to-generator": transformAsyncToGenerator,
diff --git a/packages/babel-standalone/src/preset-stage-1.js b/packages/babel-standalone/src/preset-stage-1.js
index 2d8aba73a2db..d56900552151 100644
--- a/packages/babel-standalone/src/preset-stage-1.js
+++ b/packages/babel-standalone/src/preset-stage-1.js
@@ -23,6 +23,7 @@ export default (_: any, opts: Object = {}) => {
       [babelPlugins.syntaxRecordAndTuple, { syntaxType: recordAndTupleSyntax }],
       babelPlugins.proposalExportDefaultFrom,
       [babelPlugins.proposalPipelineOperator, { proposal: pipelineProposal }],
+      babelPlugins.proposalPrivatePropertyInObject,
       babelPlugins.proposalDoExpressions,
     ],
   };