diff --git a/Dockerfile b/Dockerfile
index 33eed58..4dfb251 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,9 +17,9 @@ RUN --mount=type=cache,target=/root/.cache/uv \
 FROM python:3.12-alpine3.22
 
 ENV USER=karl
-ENV GROUPNAME=$USER
+ENV GROUPNAME=docker
 ENV UID=1000
-ENV GID=1000
+ENV GID=994
 ENV PYTHONPATH="/app"
 
 EXPOSE 8081