diff --git a/Dockerfile b/Dockerfile
index f19cd7c..d6b99ee 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ## builder
-FROM --platform=$BUILDPLATFORM debian:11-slim as builder
+FROM --platform=$BUILDPLATFORM debian:12-slim as builder
 LABEL image="ripe-atlas-builder"
 ARG BUILDPLATFORM
 ARG TARGETPLATFORM
@@ -9,8 +9,9 @@ ARG GIT_URL=https://github.com/RIPE-NCC/ripe-atlas-software-probe.git
 WORKDIR /root
 
 RUN if [ "$BUILDPLATFORM" != "$TARGETPLATFORM" ] ; then \
-	apt-get update -y \
-	apt-get install -y git build-essential debhelper libssl-dev autotools-dev psmisc net-tools
+		apt-get update -y \
+		apt-get install -y git build-essential debhelper libssl-dev autotools-dev psmisc net-tools
+	fi
 
 RUN git clone --recursive "$GIT_URL"