diff --git a/.ko.yaml b/.ko.yaml
index c7c0e49..49805d6 100644
--- a/.ko.yaml
+++ b/.ko.yaml
@@ -1,3 +1,6 @@
 defaultPlatforms:
   - linux/arm64
-  - linux/amd64
\ No newline at end of file
+  - linux/amd64
+
+# Need a shell for gitlab-ci
+defaultBaseImage: cgr.dev/chainguard/busybox