diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9a056a1..382a6b1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v3
       with:
         python-version: 3.8
diff --git a/requirements-dev.txt b/requirements-dev.txt
index e335ef5..6815f75 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@
 bandit>=1.7.0
 flake8>=3.8.4
 mypy>=0.790
-pytest>=6.2.1
+pytest>=7.4.3
 pytest-cov>=2.11.1
 pylint>=2.6.0
 pytest-aiohttp>=0.3.0
diff --git a/serversion/kubernetes.py b/serversion/kubernetes.py
index fc2408f..98e9740 100644
--- a/serversion/kubernetes.py
+++ b/serversion/kubernetes.py
@@ -37,7 +37,7 @@ def _get_token(self):
         token_path = f"{self.service_account_path}/token"
         token = None
         try:
-            with open(token_path, 'r') as opened_file:
+            with open(token_path, encoding="utf-8") as opened_file:
                 token = opened_file.read()
         except FileNotFoundError:
             # TODO: switch print to logger
@@ -91,7 +91,7 @@ def _get_versioned_images(cls, pod_info):
         }
 
     async def get_images_with_tags(self, namespaces):
-        images_with_tags = dict()
+        images_with_tags = {}
         if self.headers is None:
             self._set_headers()
         # TODO: in parallel
@@ -109,7 +109,7 @@ async def get_images_with_tags(self, namespaces):
         return images_with_tags
 
     async def get_helm_data(self):
-        helm_data = dict()
+        helm_data = {}
         async with ClientSession() as session:
             response = await session.get(
                 f"{self.api_server}/api/v1/secrets",
@@ -127,7 +127,7 @@ async def get_helm_data(self):
                     namespace: str = chart_data.get("namespace")
                     name = metadata.get("name")
                     if helm_data.get(namespace) is None:
-                        helm_data[namespace] = dict()
+                        helm_data[namespace] = {}
                     helm_data[namespace][name] = {
                         "version": metadata.get("version"),
                         "appVersion": metadata.get("appVersion"),