diff --git a/dockerfiles/dev.dockerfile b/dockerfiles/dev.dockerfile
index 39c54ba..28b30f0 100644
--- a/dockerfiles/dev.dockerfile
+++ b/dockerfiles/dev.dockerfile
@@ -1,9 +1,9 @@
-ARG PYTHON_VERSION=3.11
+ARG PYTHON_VERSION=3.12
 FROM python:${PYTHON_VERSION}
 
 WORKDIR /src
 COPY src/setup.py README.md LICENSE ./
-COPY src/pip_package_template_docker/__init__.py ./pip_package_template_docker/__init__.py
+COPY src/py_overload.py ./py_overload.py
 RUN pip install -e .[dev]
 
 COPY src .