diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 136b7df..241ae0a 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -10,7 +10,8 @@ WORKDIR /app
 COPY package*.json .npmrc ./
 
 # Install dependencies (NODE_ENV must not be production so devDependencies are installed)
-RUN NODE_ENV=development npm ci
+ENV NODE_ENV=development
+RUN npm ci
 
 # Copy source code
 COPY . .