diff --git a/src/main/java/com/example/FixLog/controller/PostController.java b/src/main/java/com/example/FixLog/controller/PostController.java
index e01fc96..7f3dfaf 100644
--- a/src/main/java/com/example/FixLog/controller/PostController.java
+++ b/src/main/java/com/example/FixLog/controller/PostController.java
@@ -4,7 +4,6 @@
 import com.example.FixLog.dto.Response;
 import com.example.FixLog.dto.post.PostResponseDto;
 import com.example.FixLog.service.PostService;
-import com.example.FixLog.service.S3Service;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 
@@ -12,11 +11,9 @@
 @RequestMapping("/posts")
 public class PostController {
     private final PostService postService;
-    private final S3Service s3Service;
 
-    public PostController(PostService postService, S3Service s3Service){
+    public PostController(PostService postService){
         this.postService = postService;
-        this.s3Service = s3Service;
     }
 
     @PostMapping
diff --git a/src/main/java/com/example/FixLog/service/PostService.java b/src/main/java/com/example/FixLog/service/PostService.java
index a47c643..d10bcd6 100644
--- a/src/main/java/com/example/FixLog/service/PostService.java
+++ b/src/main/java/com/example/FixLog/service/PostService.java
@@ -19,6 +19,8 @@
 import com.example.FixLog.repository.post.PostRepository;
 import com.example.FixLog.repository.tag.TagRepository;
 import jakarta.transaction.Transactional;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.stereotype.Service;
 import org.springframework.web.multipart.MultipartFile;
 
@@ -99,6 +101,8 @@ public void createPost(PostRequestDto postRequestDto){
 
     // 이미지 파일 마크다운으로 변경
     public String uploadImage(MultipartFile imageFile){
+        SecurityContextHolder.getContext().getAuthentication();
+
         if (imageFile == null || imageFile.isEmpty()){
             throw new CustomException(ErrorCode.IMAGE_UPLOAD_FAILED);
         }