diff --git a/packages/@vue/cli-plugin-eslint/migrator/index.js b/packages/@vue/cli-plugin-eslint/migrator/index.js
index 1c7b87bd77..aa00200496 100644
--- a/packages/@vue/cli-plugin-eslint/migrator/index.js
+++ b/packages/@vue/cli-plugin-eslint/migrator/index.js
@@ -54,7 +54,7 @@ module.exports = async (api) => {
       Object.assign(newDeps, getDeps(api, 'prettier'))
     }
 
-    api.extendPackage({ devDependencies: newDeps })
+    api.extendPackage({ devDependencies: newDeps }, true)
 
     // in case anyone's upgrading from the legacy `typescript-eslint-parser`
     if (api.hasPlugin('typescript')) {