diff --git a/vps/portbridge/Dockerfile b/vps/portbridge/Dockerfile
index 515060d..80c4b75 100644
--- a/vps/portbridge/Dockerfile
+++ b/vps/portbridge/Dockerfile
@@ -1,5 +1,5 @@
 # Static Go binary in a scratch image (~5 MB).
-FROM golang:1.26-alpine AS build
+FROM golang:1.27-alpine AS build
 WORKDIR /src
 COPY go.mod .
 COPY main.go .