diff --git a/src/main/java/team7/inplace/security/handler/CustomAccessDeniedHandler.java b/src/main/java/team7/inplace/security/handler/CustomAccessDeniedHandler.java
index cc7d18a8..1eebcd8b 100644
--- a/src/main/java/team7/inplace/security/handler/CustomAccessDeniedHandler.java
+++ b/src/main/java/team7/inplace/security/handler/CustomAccessDeniedHandler.java
@@ -2,12 +2,13 @@
 
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.security.access.AccessDeniedException;
 import org.springframework.security.web.access.AccessDeniedHandler;
 
-import java.io.IOException;
-
+@Slf4j
 public class CustomAccessDeniedHandler implements AccessDeniedHandler {
 
     @Value("${spring.redirect.front-end-url}")
@@ -15,7 +16,8 @@ public class CustomAccessDeniedHandler implements AccessDeniedHandler {
 
     @Override
     public void handle(HttpServletRequest request, HttpServletResponse response,
-                       AccessDeniedException accessDeniedException) throws IOException {
+        AccessDeniedException accessDeniedException) throws IOException {
+        log.info("Access denied");
         response.sendRedirect(frontEndUrl);
     }
 }
diff --git a/src/main/java/team7/inplace/security/handler/CustomFailureHandler.java b/src/main/java/team7/inplace/security/handler/CustomFailureHandler.java
index 1ba24dc0..e5deb740 100644
--- a/src/main/java/team7/inplace/security/handler/CustomFailureHandler.java
+++ b/src/main/java/team7/inplace/security/handler/CustomFailureHandler.java
@@ -3,6 +3,7 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.MediaType;
@@ -13,8 +14,6 @@
 import team7.inplace.global.exception.InplaceException;
 import team7.inplace.global.exception.code.AuthorizationErrorCode;
 
-import java.io.IOException;
-
 @Slf4j
 public class CustomFailureHandler implements AuthenticationFailureHandler {
 
@@ -28,10 +27,11 @@ public CustomFailureHandler(ObjectMapper objectMapper) {
 
     @Override
     public void onAuthenticationFailure(
-            HttpServletRequest request,
-            HttpServletResponse response,
-            AuthenticationException exception
+        HttpServletRequest request,
+        HttpServletResponse response,
+        AuthenticationException exception
     ) throws IOException {
+        log.info("Authentication failure");
         String accept = request.getHeader("Accept");
         if (StringUtils.hasText(accept) && accept.contains("text/html")) {
             response.sendRedirect(frontEndUrl);
@@ -40,13 +40,13 @@ public void onAuthenticationFailure(
     }
 
     private void setErrorResponse(
-            HttpServletResponse response,
-            InplaceException inplaceException
+        HttpServletResponse response,
+        InplaceException inplaceException
     ) throws IOException {
         response.setStatus(inplaceException.getHttpStatus().value());
         response.setContentType(MediaType.APPLICATION_JSON_VALUE);
         ProblemDetail problemDetail = ProblemDetail.forStatusAndDetail(
-                inplaceException.getHttpStatus(), inplaceException.getMessage());
+            inplaceException.getHttpStatus(), inplaceException.getMessage());
         response.getWriter().write(objectMapper.writeValueAsString(problemDetail));
     }
 }