diff --git a/Dockerfile b/Dockerfile
index acf6fe3..229cf38 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,7 +28,7 @@ RUN git rev-parse HEAD | tee /version
 ## Beginning of runtime image
 FROM python:3.10.4-slim-bullseye as final
 
-RUN echo "Europe/Paris" > /etc/timezone
+ENV TZ "Europe/Paris"
 
 COPY --from=venv /app/venv /app/venv/
 ENV PATH /app/venv/bin:$PATH