diff --git a/.drone.yml b/.drone.yml
index eee407e..84987f4 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,7 +3,7 @@ kind: pipeline
 name: build & publish image
 steps:
   - name: run shellcheck
-    image: debian:buster
+    image: debian:bullseye
     commands:
       - apt update
       - apt install -y shellcheck