diff --git a/go.mod b/go.mod
index 14777723..e881592c 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/nakamasato/kubernetes-training
 
 go 1.22.0
 
-toolchain go1.23.2
+toolchain go1.23.3
 
 require (
 	github.com/nakamasato/mysql-operator v0.4.1