diff --git a/Dockerfile b/Dockerfile
index 043eb40..9ba70ce 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,9 @@ WORKDIR /app
 # Copy package files first for layer caching
 COPY package.json package-lock.json* ./
 
+# Install build tools for native modules (better-sqlite3)
+RUN apk add --no-cache python3 make g++
+
 # Install all dependencies for build
 RUN npm ci
 
@@ -48,7 +51,8 @@ COPY --from=builder /app/package.json /app/package-lock.json* ./
 COPY --from=builder /app/dist ./dist
 COPY --from=builder /app/server ./server
 
-# Install production dependencies only in runtime stage
+# Install build tools for native modules + production dependencies
+RUN apk add --no-cache python3 make g++
 RUN npm ci --omit=dev
 
 # Expose backend port