diff --git a/Dockerfile.jenkins b/Dockerfile.jenkins
index a85d741..a25cd78 100644
--- a/Dockerfile.jenkins
+++ b/Dockerfile.jenkins
@@ -2,8 +2,10 @@ FROM schemers/gauche
 RUN echo "deb http://ftp.de.debian.org/debian bookworm main" > /etc/apt/sources.list
 RUN dpkg --add-architecture i386
 RUN apt update && apt install -y wine32 wine64 make wget
-RUN mkdir -p /workdir && chmod -R 777 /workdir
+RUN useradd jenkins
+RUN mkdir -p /workdir && chmod -R 777 /workdir && chown jenkins:jenkins /workdir
 WORKDIR /workdir
 COPY ./executables/nsis-3.10-setup.exe /workdir/setup.exe
+USER jenkins
 RUN WINEPREFIX=/workdir/.wine wine setup.exe /S
 ENV WINEPREFIX=/workdir/.wine