diff --git a/backend/app/services/mission.py b/backend/app/services/mission.py
index c1a3d03..b70a0ea 100644
--- a/backend/app/services/mission.py
+++ b/backend/app/services/mission.py
@@ -192,7 +192,6 @@ def registration_is_open(
         deadline = deadline.replace(tzinfo=timezone.utc)
 
     if deadline and deadline < current_time:
-
         return False
 
     if mission.capacity is not None and participant_count >= mission.capacity:
diff --git a/backend/app/services/storage.py b/backend/app/services/storage.py
index d972764..b800fad 100644
--- a/backend/app/services/storage.py
+++ b/backend/app/services/storage.py
@@ -2,8 +2,11 @@
 
 from __future__ import annotations
 
-from pathlib import Path
+import base64
+import mimetypes
 import shutil
+
+from pathlib import Path
 import mimetypes
 import base64