diff --git a/sync/Dockerfile b/sync/Dockerfile
index b7918a7..b3f45ac 100644
--- a/sync/Dockerfile
+++ b/sync/Dockerfile
@@ -2,7 +2,7 @@
 FROM node:20-slim AS builder
 WORKDIR /app
 COPY package.json package-lock.json ./
-RUN npm install
+RUN NODE_ENV=development npm install
 COPY tsconfig.json ./
 COPY src ./src
 RUN ./node_modules/.bin/tsc && npm prune --production