diff --git a/Dockerfile b/Dockerfile
index 12dc61c..484ad4c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # We use the latest Go 1.x version unless asked to use something else.
 # The GitHub Actions CI job sets this argument for a consistent Go version.
 ARG GO_VERSION=1
-ARG BASE_IMAGE=debian:bookworm-slim
+ARG BASE_IMAGE=kcllang/kcl
 
 # Setup the base environment. The BUILDPLATFORM is set automatically by Docker.
 # The --platform=${BUILDPLATFORM} flag tells Docker to build the function using