diff --git a/Dockerfile b/Dockerfile
index 6ab91cc..74b92f0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # ビルドステージ
-FROM golang:1.26-bookworm AS builder
+FROM golang:1.27-bookworm AS builder
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     libvips-dev \