diff --git a/dockerfile b/dockerfile
index a4a7b7b..58586eb 100644
--- a/dockerfile
+++ b/dockerfile
@@ -4,12 +4,12 @@ WORKDIR /usr/src/app
 
 RUN adduser --disabled-password --gecos '' appuser
 
-RUN chown -R appuser /usr/src/app
+COPY . .
+RUN pip install --no-cache-dir flask requests cryptography
 
-USER appuser
 
-COPY . .
+RUN chown -R appuser:appuser /usr/src/app
 
-RUN pip install --no-cache-dir flask requests cryptography
+USER appuser
 
-CMD ["flask", "run", "--host=0.0.0.0"]
+CMD ["python", "-m", "flask", "run", "--host=0.0.0.0"]