diff --git a/4-binary/index.md b/4-binary/index.md
index 2b0c5dc825..bc9ea32570 100644
--- a/4-binary/index.md
+++ b/4-binary/index.md
@@ -1,3 +1,3 @@
-# Binary data, files
+# ���� �����Ϳ� ����
 
-Working with binary data and files in JavaScript.
+�ڹٽ�ũ��Ʈ���� ���� �����Ϳ� ������ ������ô�.
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