diff --git a/packages/babel-standalone/package.json b/packages/babel-standalone/package.json
index 55fed226a74f..c407400a6655 100644
--- a/packages/babel-standalone/package.json
+++ b/packages/babel-standalone/package.json
@@ -27,6 +27,7 @@
     "@babel/plugin-proposal-optional-catch-binding": "^7.0.0",
     "@babel/plugin-proposal-optional-chaining": "^7.0.0",
     "@babel/plugin-proposal-pipeline-operator": "^7.0.0",
+    "@babel/plugin-proposal-private-methods": "^7.2.0",
     "@babel/plugin-proposal-throw-expressions": "^7.0.0",
     "@babel/plugin-proposal-unicode-property-regex": "^7.0.0",
     "@babel/plugin-syntax-async-generators": "^7.0.0",
diff --git a/packages/babel-standalone/src/index.js b/packages/babel-standalone/src/index.js
index 10fad226a964..5804409ad095 100644
--- a/packages/babel-standalone/src/index.js
+++ b/packages/babel-standalone/src/index.js
@@ -165,6 +165,7 @@ registerPlugins({
   "proposal-export-default-from": require("@babel/plugin-proposal-export-default-from"),
   "proposal-export-namespace-from": require("@babel/plugin-proposal-export-namespace-from"),
   "proposal-pipeline-operator": require("@babel/plugin-proposal-pipeline-operator"),
+  "proposal-private-methods": require("@babel/plugin-proposal-private-methods"),
   "transform-arrow-functions": require("@babel/plugin-transform-arrow-functions"),
   "transform-block-scoped-functions": require("@babel/plugin-transform-block-scoped-functions"),
   "transform-block-scoping": require("@babel/plugin-transform-block-scoping"),
diff --git a/packages/babel-standalone/src/preset-stage-3.js b/packages/babel-standalone/src/preset-stage-3.js
index e16237dbcd4f..04bd443e8fe9 100644
--- a/packages/babel-standalone/src/preset-stage-3.js
+++ b/packages/babel-standalone/src/preset-stage-3.js
@@ -2,6 +2,7 @@ import syntaxDynamicImport from "@babel/plugin-syntax-dynamic-import";
 import syntaxImportMeta from "@babel/plugin-syntax-import-meta";
 import transformClassProperties from "@babel/plugin-proposal-class-properties";
 import transformJsonStrings from "@babel/plugin-proposal-json-strings";
+import transformPrivateMethods from "@babel/plugin-proposal-private-methods";
 
 export default (_, opts) => {
   let loose = false;
@@ -16,6 +17,7 @@ export default (_, opts) => {
       syntaxImportMeta,
       [transformClassProperties, { loose }],
       transformJsonStrings,
+      [transformPrivateMethods, { loose }],
     ],
   };
 };