diff --git a/.github/workflows/Prepare prebuild environment.yml b/.github/workflows/Prepare prebuild environment.yml
index c04ff09a..b2d14281 100644
--- a/.github/workflows/Prepare prebuild environment.yml	
+++ b/.github/workflows/Prepare prebuild environment.yml	
@@ -49,6 +49,7 @@ jobs:
             win32-ia32,
             win32-x64,
           ]
+        #  buster -> bullseye -> bookworm
         include:
           - name: linuxmusl-x64
             os: ubuntu-latest
@@ -90,7 +91,7 @@ jobs:
 
           - name: linux-x64
             os: ubuntu-latest
-            BASE_IMAGE: library/debian:buster-slim
+            BASE_IMAGE: library/debian:bullseye-slim
             DOCKERFILE: Dockerfile.debian
             QEMU_ARCH: x86_64
             CMD: BuildNewCMD