diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..9691170
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,3 @@
+declare module 'redux-middleware-test-helper' {
+  export default function(ref: { cut: any; actionTypes: { [key: string]: string } }): void
+}