diff --git a/go.mod b/go.mod
index 79c45e0..e13649d 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/logica0419/coding-container-runtime
 
 go 1.25.0
 
-toolchain go1.26.6
+toolchain go1.27.0
 
 require (
 	github.com/k1LoW/errors v1.2.0
diff --git a/templates/go.mod b/templates/go.mod
index 63bd3ed..2278f9b 100644
--- a/templates/go.mod
+++ b/templates/go.mod
@@ -2,7 +2,7 @@ module original-runtime
 
 go 1.25.0
 
-toolchain go1.26.6
+toolchain go1.27.0
 
 require (
 	github.com/k1LoW/errors v1.2.0