diff --git a/index.js b/index.js
index ae6f4d8..945e928 100644
--- a/index.js
+++ b/index.js
@@ -12,7 +12,7 @@ const BYTE_UNITS = [
 
 const BIBYTE_UNITS = [
 	'B',
-	'kiB',
+	'KiB',
 	'MiB',
 	'GiB',
 	'TiB',