diff --git a/.mise.toml b/.mise.toml
index 1b8df9a..e7aa6b9 100644
--- a/.mise.toml
+++ b/.mise.toml
@@ -1,5 +1,5 @@
 [tools]
-ruby = "3.4.1"
+ruby = "4.0.6"
 "gem:bundler" = "4.0.4"
 
 [tasks.install]