diff --git a/OCI/Dockerfile b/OCI/Dockerfile
index b30de9b..336a62c 100644
--- a/OCI/Dockerfile
+++ b/OCI/Dockerfile
@@ -1,5 +1,5 @@
-ARG ARCH
-FROM $ARCH/alpine
+ARG PARENT_IMAGE=alpine:3.16
+FROM ${PARENT_IMAGE}
 LABEL maintainer="Dominik Chilla <dominik@zwackl.de>"
 LABEL git_repo="https://github.com/chillout2k/exota-milter"
 
@@ -23,4 +23,4 @@ RUN chown -R exota-milter /app /cmd \
 VOLUME [ "/socket", "/data" ]
 
 USER exota-milter
-CMD [ "/cmd" ]
\ No newline at end of file
+CMD [ "/cmd" ]