diff --git a/services/backend/api/v1/user/schemas.py b/services/backend/api/v1/user/schemas.py
index 2788913..2109f8e 100644
--- a/services/backend/api/v1/user/schemas.py
+++ b/services/backend/api/v1/user/schemas.py
@@ -32,7 +32,7 @@ class UserSchema(ModelSchema):
 
     class Meta:
         model = User
-        fields = ["id", "email", "username", "created_at"]
+        fields = ["id", "avatar", "email", "username", "created_at"]
 
 
 class StatSchema(Schema):
diff --git a/services/backend/apps/task/admin.py b/services/backend/apps/task/admin.py
index 10f3c67..0602752 100644
--- a/services/backend/apps/task/admin.py
+++ b/services/backend/apps/task/admin.py
@@ -3,8 +3,8 @@ from django.contrib import admin
 from apps.task.models import (
     CompetitionTask,
     CompetitionTaskAttachment,
+    CompetitionTaskCriteria,
     CompetitionTaskSubmission,
-    CompetitionTaskCriteria
 )
 
 
@@ -23,7 +23,10 @@ class CompetitionTaskAdmin(admin.ModelAdmin):
     list_display = ("title", "type", "points")
     filter_horizontal = ("reviewers",)
     list_filter = ("type",)
-    inlines = (CompletionAttachmentInline, CompetitionCriteriaInline,)
+    inlines = (
+        CompletionAttachmentInline,
+        CompetitionCriteriaInline,
+    )
 
 
 @admin.register(CompetitionTaskSubmission)
diff --git a/services/backend/apps/task/models.py b/services/backend/apps/task/models.py
index 6f37ea4..8f6936e 100644
--- a/services/backend/apps/task/models.py
+++ b/services/backend/apps/task/models.py
@@ -22,12 +22,16 @@ class CompetitionTask(BaseModel):
     in_competition_position = models.PositiveSmallIntegerField(
         verbose_name="позиция в соревновании"
     )
-    competition = models.ForeignKey(Competition, on_delete=models.CASCADE,
-                                    verbose_name="привязанное соревнование")
+    competition = models.ForeignKey(
+        Competition,
+        on_delete=models.CASCADE,
+        verbose_name="привязанное соревнование",
+    )
     title = models.CharField(verbose_name="заголовок", max_length=50)
     description = MDTextField(verbose_name="описание")
-    max_attempts = models.PositiveSmallIntegerField(null=True, blank=True,
-                                                    verbose_name="максимальное кол-во попыток")
+    max_attempts = models.PositiveSmallIntegerField(
+        null=True, blank=True, verbose_name="максимальное кол-во попыток"
+    )
     type = models.CharField(
         choices=CompetitionTaskType, max_length=8, verbose_name="тип проверки"
     )
@@ -68,7 +72,10 @@ class CompetitionTask(BaseModel):
         ),
     )
     submission_reviewers_count = models.PositiveSmallIntegerField(
-        default=1, null=True, blank=True, verbose_name="кол-во проверяющих для зачета задачи"
+        default=1,
+        null=True,
+        blank=True,
+        verbose_name="кол-во проверяющих для зачета задачи",
     )
 
     def __str__(self):
@@ -84,15 +91,9 @@ class CompetitionTaskCriteria(BaseModel):
         CompetitionTask, on_delete=models.CASCADE, related_name="criteries"
     )
 
-    name = models.TextField(
-        verbose_name="название"
-    )
-    slug = models.SlugField(
-        verbose_name="техническое название"
-    )
-    description = models.TextField(
-        verbose_name="описание критерии"
-    )
+    name = models.TextField(verbose_name="название")
+    slug = models.SlugField(verbose_name="техническое название")
+    description = models.TextField(verbose_name="описание критерии")
     max_value = models.PositiveSmallIntegerField(
         verbose_name="максимальное кол-во баллов"
     )
diff --git a/services/backend/apps/task/tasks.py b/services/backend/apps/task/tasks.py
index f9598dd..bb909c2 100644
--- a/services/backend/apps/task/tasks.py
+++ b/services/backend/apps/task/tasks.py
@@ -1,8 +1,9 @@
+import hashlib
+
 import httpx
 from celery import shared_task
 from django.conf import settings
 from django.core.files.base import ContentFile
-import hashlib
 
 from apps.task.models import CompetitionTaskSubmission
 
diff --git a/services/backend/apps/user/models.py b/services/backend/apps/user/models.py
index 598abb6..e324bcb 100644
--- a/services/backend/apps/user/models.py
+++ b/services/backend/apps/user/models.py
@@ -11,11 +11,14 @@ class UserRole(models.TextChoices):
 
 
 class User(BaseModel):
+    avatar = models.ImageField(verbose_name="аватар")
     email = models.EmailField(unique=True, verbose_name="почта")
     username = models.SlugField(unique=True, verbose_name="юзернейм")
     password = models.TextField(verbose_name="пароль")
 
-    created_at = models.DateTimeField(auto_now=True, verbose_name="дата создания")
+    created_at = models.DateTimeField(
+        auto_now=True, verbose_name="дата создания"
+    )
 
     achievements = models.ManyToManyField(
         Achievement, blank=True, verbose_name="ачивки пользователя"
@@ -29,8 +32,10 @@ class User(BaseModel):
         return check_password(self.password, password)
 
     status = models.CharField(
-        max_length=10, choices=UserRole.choices, default="student",
-        verbose_name="роль участника"
+        max_length=10,
+        choices=UserRole.choices,
+        default="student",
+        verbose_name="роль участника",
     )
 
     def __str__(self) -> str:
diff --git a/services/checker/main.py b/services/checker/main.py
index 64107cc..557fdba 100644
--- a/services/checker/main.py
+++ b/services/checker/main.py
@@ -157,12 +157,12 @@ def run_container_safely(
             "stderr": f"Container error: {str(e)}",
             "status": -1,
         }
-    # finally:
-    #     if container:
-    #         try:
-    #             container.remove(force=True)
-    #         except docker.errors.DockerException:
-    #             pass
+    finally:
+        if container:
+            try:
+                container.remove(force=True)
+            except docker.errors.DockerException:
+                pass
 
 
 def validate_file_path(path: str) -> bool:
@@ -202,6 +202,7 @@ async def execute_code(request: ExecutionRequest) -> ExecutionResponse:
             )
 
     with tempfile.TemporaryDirectory() as tmp_dir:
+        print(tmp_dir)
         bound_files = {}
         if request.files:
             async with aiohttp.ClientSession() as session: