diff --git a/src/main/java/site/sonisori/sonisori/auth/oauth2/CustomOAuth2SuccessHandler.java b/src/main/java/site/sonisori/sonisori/auth/oauth2/CustomOAuth2SuccessHandler.java
index 094bdc3..c082fee 100644
--- a/src/main/java/site/sonisori/sonisori/auth/oauth2/CustomOAuth2SuccessHandler.java
+++ b/src/main/java/site/sonisori/sonisori/auth/oauth2/CustomOAuth2SuccessHandler.java
@@ -20,13 +20,14 @@
 @RequiredArgsConstructor
 @Component
 public class CustomOAuth2SuccessHandler extends SimpleUrlAuthenticationSuccessHandler {
-
 	private final CookieUtil cookieUtil;
 	private final JwtUtil jwtUtil;
 
 	@Value("${redirect.url}")
 	private String redirectUrl;
 
+	private static final String[] DOMAINS = {"localhost", ".sonisori.site"};
+
 	@Override
 	public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
 		Authentication authentication) throws IOException, ServletException {
@@ -42,7 +43,9 @@ public void onAuthenticationSuccess(HttpServletRequest request, HttpServletRespo
 	}
 
 	private void addCookies(HttpServletResponse response, String tokenName, String tokenValue) {
-		String cookie = cookieUtil.createCookie(tokenName, tokenValue, "localhost").toString();
-		response.addHeader("Set-Cookie", cookie);
+		for (String domain : DOMAINS) {
+			String cookie = cookieUtil.createCookie(tokenName, tokenValue, domain).toString();
+			response.addHeader("Set-Cookie", cookie);
+		}
 	}
 }
diff --git a/src/main/java/site/sonisori/sonisori/config/SecurityConfig.java b/src/main/java/site/sonisori/sonisori/config/SecurityConfig.java
index dddda53..24fadc8 100644
--- a/src/main/java/site/sonisori/sonisori/config/SecurityConfig.java
+++ b/src/main/java/site/sonisori/sonisori/config/SecurityConfig.java
@@ -75,6 +75,7 @@ public CorsConfigurationSource corsConfigurationSource() {
 		CorsConfiguration configuration = new CorsConfiguration();
 
 		configuration.addAllowedOrigin("http://localhost:5173");
+		configuration.addAllowedOrigin("https://www.sonisori.site");
 		configuration.addAllowedMethod("*");
 		configuration.addAllowedHeader("*");
 		configuration.setAllowCredentials(true);
diff --git a/src/main/java/site/sonisori/sonisori/controller/UserController.java b/src/main/java/site/sonisori/sonisori/controller/UserController.java
index 9e65268..014f79f 100644
--- a/src/main/java/site/sonisori/sonisori/controller/UserController.java
+++ b/src/main/java/site/sonisori/sonisori/controller/UserController.java
@@ -37,6 +37,7 @@ public class UserController {
 	private final UserService userService;
 	private final CookieUtil cookieUtil;
 	private final JwtUtil jwtUtil;
+	private static final String[] DOMAINS = {"localhost", ".sonisori.site"};
 
 	@PostMapping("/auth/signup")
 	public ResponseEntity<Void> signUp(@RequestBody @Valid SignUpRequest signUpRequest) {
@@ -132,12 +133,16 @@ public ResponseEntity<Void> reissue(@AuthenticationPrincipal CustomUserDetails u
 	}
 
 	private void addCookies(HttpServletResponse response, String tokenName, String tokenValue) {
-		String cookie = cookieUtil.createCookie(tokenName, tokenValue, "localhost").toString();
-		response.addHeader("Set-Cookie", cookie);
+		for (String domain : DOMAINS) {
+			String cookie = cookieUtil.createCookie(tokenName, tokenValue, domain).toString();
+			response.addHeader("Set-Cookie", cookie);
+		}
 	}
 
-	private void deleteCookies(HttpServletResponse response, String cookieName) {
-		String cookie = cookieUtil.clearCookie(cookieName, "localhost").toString();
-		response.addHeader("Set-Cookie", cookie);
+	private void deleteCookies(HttpServletResponse response, String tokenName) {
+		for (String domain : DOMAINS) {
+			String cookie = cookieUtil.clearCookie(tokenName, domain).toString();
+			response.addHeader("Set-Cookie", cookie);
+		}
 	}
 }