diff --git a/Dockerfile b/Dockerfile
index e5006505..632c5979 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ RUN gradle --no-daemon build
 
 
 FROM alpine
-RUN apk add bash fontconfig font-opensans graphviz openjdk21-jre weasyprint
+RUN apk add bash fontconfig font-opensans graphviz openjdk21-jre tzdata weasyprint
 RUN adduser -D umbrella
 COPY --from=java_build /Umbrella/backend/build/libs/backend.jar /home/umbrella/jar/
 RUN chown -R umbrella /home/umbrella
@@ -25,6 +25,6 @@ ADD https://github.com/plantuml/plantuml/releases/download/v1.2025.10/plantuml-1
 WORKDIR /home/umbrella
 RUN chmod a+rx plantuml.jar
 USER umbrella
-RUN mkdir .config && ln -s /host/config.json .config/Umbrella.json
+RUN mkdir .config && ln -s /host/config.json .config/Umbrella.json && ln -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime
 EXPOSE 80
 CMD java -jar jar/backend.jar