diff --git a/core/admin/Dockerfile b/core/admin/Dockerfile
index 0adc626c..08de0e88 100644
--- a/core/admin/Dockerfile
+++ b/core/admin/Dockerfile
@@ -17,5 +17,6 @@ COPY start.sh /start.sh
 RUN pybabel compile -d mailu/translations
 
 EXPOSE 80/tcp
+VOLUME ["/data"]
 
 CMD ["/start.sh"]