diff --git a/Dockerfile b/Dockerfile
index de2468c..564232d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,9 @@ FROM python:latest
 
 # Install dependencies.
 ADD requirements.txt /requirements.txt
-ADD main.py /main.py
 RUN pip install -r requirements.txt
 
-CMD ["python", "/main.py"]
\ No newline at end of file
+# Copy code.
+ADD main.py /main.py
+
+CMD ["python", "/main.py"]