diff --git a/k8s/ingress-host-lister/go.mod b/k8s/ingress-host-lister/go.mod
index 1a0513a..b7fce76 100644
--- a/k8s/ingress-host-lister/go.mod
+++ b/k8s/ingress-host-lister/go.mod
@@ -2,7 +2,7 @@ module github.com/tier940/ingressHostLister
 
 go 1.23.0
 
-toolchain go1.23.4
+toolchain go1.26.4
 
 require (
 	k8s.io/apimachinery v0.32.0