diff --git a/Dockerfile b/Dockerfile
index c37a5be..d09aa1b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ RUN \
   apt update && \
   apt install -y gnucobol && \
   mkdir /work && \
-  useradd -d /work -g 1000 -u 1000 user
+  useradd -d /work -u 1000 user
 
 VOLUME /work
 WORKDIR /work