diff --git a/Dockerfile b/Dockerfile
index a641ae8..0e3c9fe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.4-alpine
+FROM ruby:4.0-alpine
 EXPOSE 4567
 # throw errors if Gemfile has been modified since Gemfile.lock
 RUN bundle config --global frozen 1