diff --git a/backend/Dockerfile b/backend/Dockerfile
index abc836d..f2a31fc 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -23,7 +23,7 @@ ENV NEXT_TELEMETRY_DISABLED=1
 ENV DB_PATH=/app/data/zombie_invasion.db
 
 RUN addgroup --system --gid 1001 nodejs && \
-    adduser --system --uid 1001 nextjs
+    adduser --system --uid 1001 --shell /bin/sh nextjs
 
 COPY --from=builder /app/.next/standalone ./
 COPY --from=builder /app/.next/static ./.next/static