diff --git a/Dockerfile b/Dockerfile
index e5006505..75742839 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,13 +17,12 @@ RUN gradle --no-daemon build
 
 
 FROM alpine
-RUN apk add bash fontconfig font-opensans graphviz openjdk21-jre weasyprint
+RUN apk --no-cache add bash fontconfig font-opensans graphviz openjdk21-jre weasyprint
 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
 WORKDIR /home/umbrella
-RUN chmod a+rx plantuml.jar
+RUN chown -R umbrella . ; chmod a+rx plantuml.jar
 USER umbrella
 RUN mkdir .config && ln -s /host/config.json .config/Umbrella.json
 EXPOSE 80