diff --git a/assets/controllers/image_upload_controller.js b/assets/controllers/image_upload_controller.js
index f9d2e4f..8e5f9e4 100644
--- a/assets/controllers/image_upload_controller.js
+++ b/assets/controllers/image_upload_controller.js
@@ -13,13 +13,13 @@ export default class extends Controller {
     }
 
     openDialog() {
-        this.dialogTarget.style.display = '';
+        this.dialogTarget.classList.add('active');
         this.errorTarget.textContent = '';
         this.progressTarget.style.display = 'none';
     }
 
     closeDialog() {
-        this.dialogTarget.style.display = 'none';
+        this.dialogTarget.classList.remove('active');
         this.errorTarget.textContent = '';
         this.progressTarget.style.display = 'none';
     }
diff --git a/assets/styles/03-components/image-upload.css b/assets/styles/03-components/image-upload.css
index 8ee2d93..3123cb5 100644
--- a/assets/styles/03-components/image-upload.css
+++ b/assets/styles/03-components/image-upload.css
@@ -34,7 +34,6 @@
 
 .iu-modal .modal-header {
     padding: var(--spacing-3);
-    border-bottom: 1px solid var(--color-border, #dee2e6);
     display: flex;
     justify-content: space-between;
     align-items: center;