diff --git a/internal/scripts/docker/Dockerfile.copy b/internal/scripts/docker/Dockerfile.copy
index a10934f5b2..bcd6e4a3db 100644
--- a/internal/scripts/docker/Dockerfile.copy
+++ b/internal/scripts/docker/Dockerfile.copy
@@ -1,5 +1,5 @@
 ARG MET_BASE_REPO=met-base-unit-test
-ARG MET_BASE_TAG=v2.1
+ARG MET_BASE_TAG=v2.1_debian12
 
 FROM dtcenter/${MET_BASE_REPO}:${MET_BASE_TAG}
 MAINTAINER John Halley Gotway <johnhg@ucar.edu>