diff --git a/Dockerfile b/Dockerfile
index fd83293c5..594083f39 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,8 +6,8 @@ WORKDIR /app
 # Copy package files
 COPY package*.json ./
 
-# Install dependencies
-RUN npm ci --omit=dev
+# Install dependencies (use npm install if no lock file)
+RUN if [ -f package-lock.json ]; then npm ci --omit=dev; else npm install --omit=dev; fi
 
 # Copy all source code
 COPY . .