diff --git a/backend/src/main/java/com/mapbefine/mapbefine/auth/infrastructure/JwtTokenProvider.java b/backend/src/main/java/com/mapbefine/mapbefine/auth/infrastructure/JwtTokenProvider.java
index 36a5d1ad..062dbf37 100644
--- a/backend/src/main/java/com/mapbefine/mapbefine/auth/infrastructure/JwtTokenProvider.java
+++ b/backend/src/main/java/com/mapbefine/mapbefine/auth/infrastructure/JwtTokenProvider.java
@@ -13,9 +13,11 @@
 import io.jsonwebtoken.SignatureAlgorithm;
 import java.util.Date;
 import java.util.UUID;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
 
+@Slf4j
 @Component
 public class JwtTokenProvider implements TokenProvider {
 
@@ -94,6 +96,8 @@ private boolean isExpired(String token) {
         } catch (ExpiredJwtException e) {
             return true;
         } catch (JwtException | IllegalArgumentException e) {
+            log.warn("source = {}", e.getStackTrace()[0].toString());
+
             throw new AuthUnauthorizedException(ILLEGAL_TOKEN);
         }
     }