diff --git a/Dockerfile b/Dockerfile
index c2a9724..d8b60d3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,11 @@
-FROM python:3.7
+FROM python:3.10
 
-RUN pip install "PyGithub>=1.55,<2.0" "pydantic>=v1.8.2,<2.0"
+COPY ./requirements.txt /code/requirements.txt
 
-COPY ./app /app
+RUN pip install -r /code/requirements.txt
 
-CMD ["python", "/app/main.py"]
+COPY ./app /code/app
+
+ENV PYTHONPATH=/code/app
+
+CMD ["python", "/code/app/main.py"]
diff --git a/app/main.py b/app/main.py
index 18703af..4a5ea63 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,4 +1,4 @@
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 import logging
 from pathlib import Path
 from typing import Dict, List, Optional, Set
@@ -7,7 +7,8 @@
 from github.Issue import Issue
 from github.IssueComment import IssueComment
 from github.IssueEvent import IssueEvent
-from pydantic import BaseModel, BaseSettings, SecretStr, validator
+from pydantic import BaseModel, SecretStr, validator
+from pydantic_settings import BaseSettings
 
 
 class KeywordMeta(BaseModel):
@@ -92,11 +93,12 @@ def process_issue(*, issue: Issue, settings: Settings) -> None:
     events = list(issue.get_events())
     labeled_events = get_labeled_events(events)
     last_comment = get_last_comment(issue)
+    now = datetime.now(timezone.utc)
     for keyword, keyword_meta in settings.input_config.items():
         # Check closable delay, if enough time passed and the issue could be closed
         closable_delay = (
             last_comment is None
-            or (datetime.utcnow() - keyword_meta.delay) > last_comment.created_at
+            or (now - keyword_meta.delay) > last_comment.created_at
         )
         # Check label, optionally removing it if there's a comment after adding it
         if keyword in label_strs:
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..65e67cf
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+PyGithub
+pydantic>=2.5.3,<3.0.0
+pydantic-settings>=2.1.0,<3.0.0