diff --git a/step2-04/exercise/src/index.ts b/step2-04/exercise/src/index.ts
new file mode 100644
index 0000000..8b6ab17
--- /dev/null
+++ b/step2-04/exercise/src/index.ts
@@ -0,0 +1,2 @@
+export { Stack } from './stack';
+export { TestMe } from './TestMe';