diff --git a/Dockerfile b/Dockerfile
index 63433f22..b81d2ace 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,8 +22,9 @@ RUN adduser -D umbrella
 COPY --from=java_build /Umbrella/backend/build/libs/backend.jar /home/umbrella/jar/
 RUN chown -R umbrella /home/umbrella
 ADD https://github.com/plantuml/plantuml/releases/download/v1.2025.10/plantuml-1.2025.10.jar /home/umbrella/plantuml.jar
-USER umbrella
 WORKDIR /home/umbrella
+RUN chmod a+wx plantuml.jar
+USER umbrella
 RUN mkdir .config && ln -s /host/config.json .config/Umbrella.json
 EXPOSE 80
 CMD java -jar jar/backend.jar