diff --git a/Dockerfile b/Dockerfile
index 66170fd..db14f85 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -32,7 +32,7 @@ FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.9.0@sha256:c64defb9ed5a91eacb37f9
 # =============================================================================
 # Stage 1: Build Tailscale combined binary (cross-compiled, runs natively)
 # =============================================================================
-FROM --platform=$BUILDPLATFORM golang:1.26.5-alpine@sha256:0178a641fbb4858c5f1b48e34bdaabe0350a330a1b1149aabd498d0699ff5fb2 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26.6-alpine@sha256:af8d6740070b8906d12eae1c3e3ea0957fb63f492051ea05e354c38ef9fe88df AS builder
 
 # renovate: datasource=github-releases depName=tailscale packageName=tailscale/tailscale versioning=semver
 ARG TAILSCALE_VERSION=v1.102.2