diff --git a/Dockerfile b/Dockerfile
index 7ff59a4..50a21ed 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,8 @@ ENV PORT=8000
 ENV STATIC_DIR=/public/static
 EXPOSE 8000
 
-RUN adduser --disabled-password --home /app --system --uid 19143 ljg && \
+RUN addgroup --gid 19143 --system ljg && \
+    adduser --disabled-password --home /app --in-group ljg --system --uid 19143 ljg && \
     mkdir /public && \
     chown -R 19143:19143 /public