diff --git a/viewer/Dockerfile b/viewer/Dockerfile
index 794bcf5..524fd4c 100644
--- a/viewer/Dockerfile
+++ b/viewer/Dockerfile
@@ -1,3 +1,3 @@
-FROM docker.io/library/nginx:alpine
+FROM docker.io/library/nginx:alpine-slim
 COPY . /usr/share/nginx/html
 # datadir should be mounted to: /usr/share/nginx/html/data