diff --git a/go.mod b/go.mod
index 53a24c1..26c0aa6 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/rokuosan/github-issue-cms
 
 go 1.25.0
 
-toolchain go1.26.4
+toolchain go1.26.5
 
 require (
 	github.com/google/go-cmp v0.7.0
diff --git a/mise.toml b/mise.toml
index 032fa1f..41724a7 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,4 +1,4 @@
 [tools]
-go = "1.26.4"
+go = "1.26.5"
 golangci-lint = "2.12.2"
 goreleaser = "2.16.0"