diff --git a/backend/Dockerfile b/backend/Dockerfile
index 54b5e51..e0259dc 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -6,6 +6,7 @@ COPY package*.json ./
 RUN npm install --production
 
 COPY . .
+RUN npm install --save-dev @types/express
 RUN npm install -g typescript
 RUN npm run build