diff --git a/backend/feature/image/src/adapter/delivery/image_controller.rs b/backend/feature/image/src/adapter/delivery/image_controller.rs
index 4d3acfe..133db87 100644
--- a/backend/feature/image/src/adapter/delivery/image_controller.rs
+++ b/backend/feature/image/src/adapter/delivery/image_controller.rs
@@ -28,6 +28,8 @@ pub trait ImageController: Send + Sync {
 pub struct ImageControllerImpl {
     upload_image_use_case: Arc<dyn UploadImageUseCase>,
     get_image_use_case: Arc<dyn GetImageUseCase>,
+
+    mime_type_whitelist: Vec<String>,
 }
 
 impl ImageControllerImpl {
@@ -38,6 +40,12 @@ impl ImageControllerImpl {
         Self {
             upload_image_use_case,
             get_image_use_case,
+            mime_type_whitelist: vec![
+                "image/jpeg".to_string(),
+                "image/png".to_string(),
+                "image/gif".to_string(),
+                "image/webp".to_string(),
+            ],
         }
     }
 }
@@ -48,6 +56,10 @@ impl ImageController for ImageControllerImpl {
         &self,
         image: ImageRequestDto,
     ) -> Result<ImageInfoResponseDto, ImageError> {
+        if !self.mime_type_whitelist.contains(&image.mime_type) {
+            return Err(ImageError::UnsupportedMimeType);
+        }
+
         let id = self
             .upload_image_use_case
             .execute(image.to_entity())
diff --git a/backend/feature/image/src/application/error/image_error.rs b/backend/feature/image/src/application/error/image_error.rs
index de3810d..5c10b00 100644
--- a/backend/feature/image/src/application/error/image_error.rs
+++ b/backend/feature/image/src/application/error/image_error.rs
@@ -3,4 +3,5 @@ pub enum ImageError {
     DatabaseError(String),
     StorageError(String),
     NotFound,
+    UnsupportedMimeType,
 }
diff --git a/backend/feature/image/src/framework/db/image_record.rs b/backend/feature/image/src/framework/db/image_record.rs
index 11548c8..b74bbab 100644
--- a/backend/feature/image/src/framework/db/image_record.rs
+++ b/backend/feature/image/src/framework/db/image_record.rs
@@ -1,4 +1,4 @@
-#[derive(sqlx::FromRow, Debug)]
+#[derive(sqlx::FromRow)]
 pub struct ImageRecord {
     pub id: i32,
     pub mime_type: String,
diff --git a/backend/feature/image/src/framework/web/image_web_routes.rs b/backend/feature/image/src/framework/web/image_web_routes.rs
index 4bc07a6..4d0c206 100644
--- a/backend/feature/image/src/framework/web/image_web_routes.rs
+++ b/backend/feature/image/src/framework/web/image_web_routes.rs
@@ -57,10 +57,13 @@ async fn upload_image_handler(
 
     match result {
         Ok(image_info) => HttpResponse::Created().json(image_info),
-        Err(e) => {
-            log::error!("{e:?}");
-            HttpResponse::InternalServerError().finish()
-        }
+        Err(e) => match e {
+            ImageError::UnsupportedMimeType => HttpResponse::BadRequest().body(format!("{e:?}")),
+            _ => {
+                log::error!("{e:?}");
+                HttpResponse::InternalServerError().finish()
+            }
+        },
     }
 }
 
@@ -75,13 +78,12 @@ async fn get_image_by_id_handler(
         Ok(image_response) => HttpResponse::Ok()
             .content_type(image_response.mime_type)
             .body(image_response.data),
-        Err(e) => {
-            if e == ImageError::NotFound {
-                HttpResponse::NotFound().finish()
-            } else {
+        Err(e) => match e {
+            ImageError::NotFound => HttpResponse::NotFound().finish(),
+            _ => {
                 log::error!("{e:?}");
                 HttpResponse::InternalServerError().finish()
             }
-        }
+        },
     }
 }
diff --git a/backend/feature/post/src/framework/db/post_with_label_record.rs b/backend/feature/post/src/framework/db/post_with_label_record.rs
index 4999304..20fcabe 100644
--- a/backend/feature/post/src/framework/db/post_with_label_record.rs
+++ b/backend/feature/post/src/framework/db/post_with_label_record.rs
@@ -1,6 +1,6 @@
 use chrono::NaiveDateTime;
 
-#[derive(sqlx::FromRow, Debug)]
+#[derive(sqlx::FromRow)]
 pub struct PostWithLabelRecord {
     pub post_id: i32,
     pub title: String,