diff --git a/Dockerfile b/Dockerfile
index 7fd3d28..e93fc7d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,8 @@ WORKDIR /app
 COPY package*.json ./
 
 # Install dependencies (including devDependencies for build)
-RUN npm ci
+# Use npm ci if package-lock.json exists, otherwise use npm install
+RUN if [ -f package-lock.json ]; then npm ci; else npm install; fi
 
 # ======================
 # Stage 2: Builder