diff --git a/2.11/windows-builder/ltsc2025/Dockerfile b/2.11/windows-builder/ltsc2025/Dockerfile
index 64296ad..137f863 100644
--- a/2.11/windows-builder/ltsc2025/Dockerfile
+++ b/2.11/windows-builder/ltsc2025/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.26-windowsservercore-ltsc2025
+FROM golang:1.27rc1-windowsservercore-ltsc2025
 
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
diff --git a/2.11/windows-builder/ltsc2025/Dockerfile.base b/2.11/windows-builder/ltsc2025/Dockerfile.base
index cd4bf59..eaa7ef3 100644
--- a/2.11/windows-builder/ltsc2025/Dockerfile.base
+++ b/2.11/windows-builder/ltsc2025/Dockerfile.base
@@ -1 +1 @@
-FROM golang:1.26-windowsservercore-ltsc2025
+FROM golang:1.27rc1-windowsservercore-ltsc2025