diff --git a/index.ts b/index.ts
index 54d0711..bd8dff5 100644
--- a/index.ts
+++ b/index.ts
@@ -11,4 +11,4 @@ function isBackward (selection: Selection): boolean {
      (position === 0 && startOffset < endOffset));
 }
 
-export = isBackward;
+export default isBackward;