diff --git a/config/resolveModuleIds.ts b/config/resolveModuleIds.ts
index a53da422efb..37dec13b646 100644
--- a/config/resolveModuleIds.ts
+++ b/config/resolveModuleIds.ts
@@ -91,6 +91,7 @@ function normalizeId(id: string, file: string) {
   const basedir = path.dirname(file);
   const absPath = resolve.sync(id, {
     basedir,
+    extensions: [".mjs", ".js"],
     packageFilter(pkg) {
       return pkg.module ? {
         ...pkg,