diff --git a/provisioning/image/ansible/04_xbuild.yml b/provisioning/image/ansible/04_xbuild.yml
index 8fa03c8c..57d5cacc 100644
--- a/provisioning/image/ansible/04_xbuild.yml
+++ b/provisioning/image/ansible/04_xbuild.yml
@@ -11,7 +11,7 @@
         update=yes
     # ruby
     # datasource=ruby-version depName=ruby
-    - command: /home/isucon/.xbuild/ruby-install 3.3.4 /home/isucon/.local/ruby
+    - command: /home/isucon/.xbuild/ruby-install 3.3.5 /home/isucon/.local/ruby
       args:
         creates: /home/isucon/.local/ruby/bin/ruby
     # node