diff --git a/flow-typed/npm/babel_v7.x.x.js b/flow-typed/npm/babel_v7.x.x.js
index c0d9d133dd81c3..53953323b24040 100644
--- a/flow-typed/npm/babel_v7.x.x.js
+++ b/flow-typed/npm/babel_v7.x.x.js
@@ -734,6 +734,8 @@ declare module '@babel/core' {
      */
     only?: MatchPattern | Array<MatchPattern>,
 
+    extensions?: Array<string>,
+
     // Source Map options
 
     /**
@@ -1223,6 +1225,12 @@ declare module '@babel/generator' {
   ) => GeneratorResult;
 }
 
+declare module '@babel/register' {
+  import type {BabelCoreOptions} from '@babel/core';
+
+  declare module.exports: (options?: BabelCoreOptions) => void;
+}
+
 declare module '@babel/template' {
   import type {Node, Statement, Expression, Program} from '@babel/types';