diff --git a/Dockerfile b/Dockerfile
index 72f88db2bc..25c83f2fdd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:4.0.8
+FROM ruby:4.0.9
 ENV LANG=C.UTF-8
 ENV ENABLE_SERVICE_WORKER=true