diff --git a/dockerfile b/dockerfile
index 016619b..9f9a965 100644
--- a/dockerfile
+++ b/dockerfile
@@ -25,5 +25,8 @@ RUN apt update \
         git \
  && find /var/lib/apt -type f -delete
 
-VOLUME /workdir
+RUN useradd -rm builder
+
+USER builder
+
 WORKDIR /workdir