diff --git a/Dockerfile b/Dockerfile
index 29d25e5..e907fd5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ FROM docker.io/library/node:18-alpine AS build_node_modules
 # Copy Web UI
 COPY src/ /app/
 WORKDIR /app
-RUN npm ci
+RUN npm ci --omit=dev
 
 # Copy build result to a new image.
 # This saves a lot of disk space.