diff --git a/Containerfile b/Containerfile
index 3e86c4e..26c6dc9 100644
--- a/Containerfile
+++ b/Containerfile
@@ -20,7 +20,7 @@ RUN pacman -Sy --noconfirm && \
 # Create user/groups as per your script, with -l to avoid system user quirks
 RUN groupadd -g $DEV_GID $DEV_USER && \
   groupadd -g 1002 secproc && groupadd -g 1003 appdata && \
-  useradd -l -ms /bin/fish -G secproc appdata -u $DEV_UID -g $DEV_GID $DEV_USER
+  useradd -l -ms /bin/fish -G secproc,appdata -u $DEV_UID -g $DEV_GID $DEV_USER
 
 # ────────────────────────
 # Stage 2: Workspace Image