diff --git a/docs/Dockerfile b/docs/Dockerfile
index 2e37d8b1..fb6f6d09 100644
--- a/docs/Dockerfile
+++ b/docs/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.1
+FROM ruby:3.4.7
 
 ENV LC_ALL C.UTF-8
 ENV LANG en_US.UTF-8