diff --git a/backend/src/main/java/org/example/backend/jwt/JWTUtil.java b/backend/src/main/java/org/example/backend/jwt/JWTUtil.java
index 172a3c92..f7e58b48 100644
--- a/backend/src/main/java/org/example/backend/jwt/JWTUtil.java
+++ b/backend/src/main/java/org/example/backend/jwt/JWTUtil.java
@@ -70,7 +70,8 @@ public boolean validateToken(String token) {
         }
     }
 
-    public Claims extractClaims(String token) {
+    public Claims extractClaims(String token) { // JWT 토큰에서 클레임(Claims)을 추출
+        // 반환된 Claims 객체는 JWT 토큰에 포함된 데이터를 키-값 쌍으로 제공
         return Jwts.parserBuilder()
                 .setSigningKey(key)
                 .build()
diff --git a/backend/src/main/java/org/example/backend/jwt/LoginFilter.java b/backend/src/main/java/org/example/backend/jwt/LoginFilter.java
index ddeadcf8..919fb118 100644
--- a/backend/src/main/java/org/example/backend/jwt/LoginFilter.java
+++ b/backend/src/main/java/org/example/backend/jwt/LoginFilter.java
@@ -88,8 +88,7 @@ protected void successfulAuthentication(HttpServletRequest request, HttpServletR
 
         String role = auth.getAuthority();
 
-        String accessToken = jwtUtil.createJwt(loginId, role, 100000000 * 1800 * 100 * 10L);
-        String refreshToken = jwtUtil.createJwt(loginId, role, 60 * 60 * 24 * 30 * 1000L);
+        String accessToken = jwtUtil.createJwt(loginId, role, 1800 * 1000L);
 
         response.addHeader("Authorization", "Bearer " + accessToken);
     }