diff --git a/Dockerfile b/Dockerfile
index bcfbefe..20683c5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ARG DEBIAN_VERSION=bullseye-slim
-FROM golang:bookworm as confd
+FROM golang:${DEBIAN_VERSION%-*} as confd
 RUN apt-get update \
  && apt-get install -y \
     build-essential \