diff --git a/src/rules/noUndefinedTypes.js b/src/rules/noUndefinedTypes.js
index eaf8eb362..099fa04db 100644
--- a/src/rules/noUndefinedTypes.js
+++ b/src/rules/noUndefinedTypes.js
@@ -1,5 +1,5 @@
 // eslint-disable-next-line import/no-unassigned-import
-import 'core-js/fn/array/flat-map';
+import 'core-js/stable/array/flat-map';
 import _ from 'lodash';
 import {parse as parseType, traverse} from 'jsdoctypeparser';
 import iterateJsdoc, {parseComment} from '../iterateJsdoc';