diff --git a/go.mod b/go.mod
index 0d00b3a..46c7007 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/hatena/chi-middlewares
 
 go 1.23
 
-toolchain go1.26.5
+toolchain go1.27.3
 
 require (
 	github.com/go-chi/chi/v5 v5.3.1