diff --git a/src/index.ts b/src/index.ts
index 7a0748f..04e323e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -92,7 +92,7 @@ export default function createConfig({
           ecmaFeatures: {
             jsx: mayHaveJsxInSfc,
           },
-          extraFileExtensions: ['vue'],
+          extraFileExtensions: ['.vue'],
         },
       },
       rules: {