diff --git a/epicbox-ruby/Dockerfile b/epicbox-ruby/Dockerfile
index f76f54e..bd441bf 100644
--- a/epicbox-ruby/Dockerfile
+++ b/epicbox-ruby/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.5.3-alpine
+FROM ruby:3.3.5-alpine
 
 RUN adduser -DH -h /sandbox sandbox && \
     apk add --no-cache --virtual build-dependencies build-base && \