diff --git a/backend/Dockerfile b/backend/Dockerfile
index d53b255..c2c1202 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,7 +1,7 @@
 FROM fascinated/docker-images:nodejs_20_with_pnpm
 WORKDIR /app
 
-COPY package.json pnpm-lock.yaml ./backend ./
+COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./backend ./
 
 RUN pnpm install --filter backend
 RUN pnpm run build:backend