diff --git a/prepare.sh b/prepare.sh
index 821323a..5498bba 100755
--- a/prepare.sh
+++ b/prepare.sh
@@ -108,6 +108,8 @@ fi
 if [ "$BUILD_BACKEND" = true ]; then
   echo -e "${GREEN}Building backend...${NC}"
   cd backend
+  rm -rf node_modules package-lock.json
+  npm cache clean --force
   npm install
   npm run build:prod
   cd ..