diff --git a/backend/Dockerfile b/backend/Dockerfile
index 3b49d23..2ee0298 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -13,6 +13,9 @@ COPY prisma ./prisma/
 # Install dependencies
 RUN npm install
 
+# Build tinypdf-plus package
+RUN cd node_modules/tinypdf-plus && npm run build || (echo "tinypdf-plus build failed" && exit 1)
+
 # Copy source
 COPY . .