diff --git a/Dockerfile b/Dockerfile
index 6a76148..c5b9753 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,8 @@ FROM ruby:3.3-alpine
 
 RUN apk update && apk add --no-cache git
 
+ADD 'https://www.random.org/cgi-bin/randbyte?nbytes=10&format=h' skipcache
+
 RUN gem install synvert
 
 ENTRYPOINT ["synvert-ruby"]