diff --git a/Dockerfile b/Dockerfile
index f895507..415ba4a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 # ---- Build stage ----
-FROM golang:1.25.7-bookworm AS builder
+FROM golang:1.27.0-bookworm AS builder
 
 WORKDIR /src
 
diff --git a/go.mod b/go.mod
index 21a1148..eacfc52 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/fun-dotto/server
 
-go 1.25.7
+go 1.27.0
 
 require (
 	ariga.io/atlas v1.2.0
diff --git a/mise.toml b/mise.toml
index d185b0d..c38a5e8 100644
--- a/mise.toml
+++ b/mise.toml
@@ -4,7 +4,7 @@ minimum_release_age = "7d"
 [tools]
 atlas = "1.2.0"
 gcloud = "575.0.0"
-go = "1.25.7"
+go = "1.27.0"
 # portless (npm backend) の実行に Node.js 24+ が必要
 node = "24.19.0"
 "npm:portless" = "0.15.5"