diff --git a/bereal/server.py b/bereal/server.py
index d83adeb..5fb1250 100644
--- a/bereal/server.py
+++ b/bereal/server.py
@@ -18,7 +18,7 @@
 from flask_cors import CORS  # noqa: E402
 from flask_limiter import Limiter  # noqa: E402
 from flask_limiter.util import get_remote_address  # noqa: E402
-from flask_migrate import Migrate
+from flask_migrate import Migrate  # noqa: E402
 from flask_sqlalchemy import SQLAlchemy  # noqa: E402
 from itsdangerous import URLSafeTimedSerializer  # noqa: E402
 
diff --git a/docker/Dockerfile.server b/docker/Dockerfile.server
index 5653ad3..4ea5ace 100644
--- a/docker/Dockerfile.server
+++ b/docker/Dockerfile.server
@@ -4,6 +4,9 @@ WORKDIR /app
 
 COPY . /app
 
+RUN sudo apt-get update
+RUN sudo apt-get install netcat
+
 RUN pip install --upgrade pip
 RUN pip install --no-cache-dir -r requirements/prod.txt