diff --git a/src/main/kotlin/html4tree/main.kt b/src/main/kotlin/html4tree/main.kt
index b4558624..aa4822e4 100644
--- a/src/main/kotlin/html4tree/main.kt
+++ b/src/main/kotlin/html4tree/main.kt
@@ -323,6 +323,8 @@ ${cssContent}              </style>
         <meta charset="UTF-8">
         <meta name="viewport" content="width=device-width, initial-scale=1.0">
         <meta name="color-scheme" content="light dark">
+        <!-- 보안 향상: 검색 엔진 인덱싱을 통한 정보 노출 방지 -->
+        <meta name="robots" content="noindex, nofollow">
         <!-- 보안 향상: 인라인 스크립트 실행 방지 -->
         <meta http-equiv="Content-Security-Policy" content="default-src 'none'; style-src '${styleHash}'; base-uri 'none'; form-action 'none';">
         <!-- 보안 향상: 리퍼러를 통한 디렉토리 경로 노출 방지 -->
diff --git a/src/test/kotlin/html4tree/MainTest.kt b/src/test/kotlin/html4tree/MainTest.kt
index 13494714..00f03f09 100644
--- a/src/test/kotlin/html4tree/MainTest.kt
+++ b/src/test/kotlin/html4tree/MainTest.kt
@@ -309,6 +309,7 @@ class MainTest {
         val htmlContent = indexFile.readText()
         assertTrue(htmlContent.contains("<html lang=\"ko\">"))
         assertTrue(htmlContent.contains("<meta name=\"color-scheme\" content=\"light dark\">"))
+        assertTrue(htmlContent.contains("<meta name=\"robots\" content=\"noindex, nofollow\">"))
         assertTrue(htmlContent.contains("<nav aria-label=\"디렉토리 목록\">"))
         assertTrue(htmlContent.contains("role=\"list\""))
         assertTrue(htmlContent.contains("<main>"))
