diff --git a/app/data/container-build/cerc-lighthouse/Dockerfile b/app/data/container-build/cerc-lighthouse/Dockerfile
index cab3af0..9391e93 100644
--- a/app/data/container-build/cerc-lighthouse/Dockerfile
+++ b/app/data/container-build/cerc-lighthouse/Dockerfile
@@ -1,4 +1,5 @@
-FROM sigp/lighthouse:v4.1.0-modern
+ARG TAG_SUFFIX="-modern"
+FROM sigp/lighthouse:v4.1.0${TAG_SUFFIX}
 
 RUN apt-get update; apt-get install bash netcat curl less jq -y;