diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8f7c753..f4166bf 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,5 @@
 stages:
+  - lint
   - build
   - deploy-dev
   - deploy-prod
@@ -7,6 +8,13 @@ variables:
   SOLUTIONS_ROOT_EXTERNAL: "/sprint-data/data/solutions"
   DB_HOST: "postgres"
 
+lint:
+  stage: lint
+  tags:
+    - main
+  script:
+    - mypy --ignore-missing-imports .
+
 build:
   stage: build
   tags:
diff --git a/SprintLib/BaseView.py b/SprintLib/BaseView.py
index 4b1ea64..ec9758f 100644
--- a/SprintLib/BaseView.py
+++ b/SprintLib/BaseView.py
@@ -1,10 +1,11 @@
+from typing import Optional
+
 from django.core.handlers.wsgi import WSGIRequest
 from django.http import HttpResponseRedirect
 from django.shortcuts import render
 from django.utils import timezone
 
 from SprintLib.EntityStorage import EntityStorage
-from Main.models import *
 
 
 class AccessError(Exception):
@@ -15,8 +16,8 @@ class BaseView:
     request: WSGIRequest = None
     context: dict = {}
     entities = EntityStorage()
-    required_login: bool = None
-    view_file: str = None
+    required_login: Optional[bool] = None
+    view_file: Optional[str] = None
 
     @classmethod
     def as_view(cls):
@@ -33,6 +34,7 @@ class BaseView:
                     return HttpResponseRedirect("/")
             request_method = request.method.lower()
             c.request = request
+            exec("from Main.models import *")
             for key in request.GET.keys():
                 if key.endswith("_id"):
                     model_name = key.rstrip("_id")
diff --git a/SprintLib/EntityStorage.py b/SprintLib/EntityStorage.py
index e832113..b3c2e0b 100644
--- a/SprintLib/EntityStorage.py
+++ b/SprintLib/EntityStorage.py
@@ -1,5 +1,8 @@
+from django.db.models import Model
+
+
 class EntityStorage:
-    entities = {}
+    entities: dict[str, Model] = {}
 
     def add(self, name, entity):
         self.entities[name] = entity
diff --git a/SprintLib/testers/CSharpTester.py b/SprintLib/testers/CSharpTester.py
index 41742e1..17c372e 100644
--- a/SprintLib/testers/CSharpTester.py
+++ b/SprintLib/testers/CSharpTester.py
@@ -1,4 +1,4 @@
-from SprintLib.testers import BaseTester
+from SprintLib.testers.BaseTester import BaseTester
 
 
 class CSharpTester(BaseTester):
diff --git a/SprintLib/testers/CppTester.py b/SprintLib/testers/CppTester.py
index 7033fc5..d5a7ffc 100644
--- a/SprintLib/testers/CppTester.py
+++ b/SprintLib/testers/CppTester.py
@@ -1,6 +1,4 @@
-from os import listdir
-
-from SprintLib.testers import BaseTester, TestException
+from SprintLib.testers.BaseTester import BaseTester
 
 
 class CppTester(BaseTester):
diff --git a/SprintLib/testers/GoTester.py b/SprintLib/testers/GoTester.py
index 0ed1681..934a471 100644
--- a/SprintLib/testers/GoTester.py
+++ b/SprintLib/testers/GoTester.py
@@ -1,4 +1,4 @@
-from SprintLib.testers import BaseTester
+from SprintLib.testers.BaseTester import BaseTester
 
 
 class GoTester(BaseTester):
diff --git a/SprintLib/testers/JavaTester.py b/SprintLib/testers/JavaTester.py
index 830e198..d4180f5 100644
--- a/SprintLib/testers/JavaTester.py
+++ b/SprintLib/testers/JavaTester.py
@@ -1,6 +1,6 @@
 from os import listdir
 
-from SprintLib.testers import BaseTester, TestException
+from SprintLib.testers.BaseTester import BaseTester, TestException
 
 
 class JavaTester(BaseTester):
diff --git a/SprintLib/testers/KotlinTester.py b/SprintLib/testers/KotlinTester.py
index 07b2e7d..94f6b60 100644
--- a/SprintLib/testers/KotlinTester.py
+++ b/SprintLib/testers/KotlinTester.py
@@ -1,6 +1,6 @@
 from os import listdir
 
-from SprintLib.testers import BaseTester, TestException
+from SprintLib.testers.BaseTester import BaseTester, TestException
 
 
 class KotlinTester(BaseTester):
diff --git a/SprintLib/testers/__init__.py b/SprintLib/testers/__init__.py
index cf0c9a2..cd44294 100644
--- a/SprintLib/testers/__init__.py
+++ b/SprintLib/testers/__init__.py
@@ -1,7 +1,7 @@
-from .BaseTester import *
-from .Python3Tester import *
-from .CppTester import *
-from .GoTester import *
-from .JavaTester import *
-from .CSharpTester import *
-from .KotlinTester import *
+from .BaseTester import BaseTester
+from .Python3Tester import Python3Tester
+from .CppTester import CppTester
+from .GoTester import GoTester
+from .JavaTester import JavaTester
+from .CSharpTester import CSharpTester
+from .KotlinTester import KotlinTester