diff --git a/src/main/java/com/umc/naoman/global/security/util/CookieUtils.java b/src/main/java/com/umc/naoman/global/security/util/CookieUtils.java
index eba6a9a..3706657 100644
--- a/src/main/java/com/umc/naoman/global/security/util/CookieUtils.java
+++ b/src/main/java/com/umc/naoman/global/security/util/CookieUtils.java
@@ -12,9 +12,11 @@
 import java.util.Base64;
 
 public class CookieUtils {
+    private static final String COOKIE_DOMAIN = ".naoman.site";
     public static void addCookie(HttpServletResponse response, String name, String value, int maxAge) {
         ResponseCookie cookie = ResponseCookie.from(name, value)
                 .path("/")
+                .domain(COOKIE_DOMAIN)
                 .maxAge(maxAge)
                 .httpOnly(false)
                 .secure(true)