diff --git a/util/copyrights b/util/copyrights
index eeeeeca713..585e7f4760 100644
--- a/util/copyrights
+++ b/util/copyrights
@@ -2824,15 +2824,15 @@
 ./contrib/dnspriv/named.conf			CONF-C	2017
 ./contrib/dnspriv/nginx.conf			SH	2017
 ./contrib/docker/centos-amd64:latest/Dockerfile	X	2017
-./contrib/docker/debian-amd64:oldstable/Dockerfile	X	2017
-./contrib/docker/debian-amd64:stable/Dockerfile	X	2017
-./contrib/docker/debian-amd64:unstable/Dockerfile	X	2017
-./contrib/docker/debian-i386:oldstable/Dockerfile	X	2017
-./contrib/docker/debian-i386:stable/Dockerfile	X	2017
-./contrib/docker/debian-i386:unstable/Dockerfile	X	2017
+./contrib/docker/debian-amd64:oldstable/Dockerfile	X	2017,2018
+./contrib/docker/debian-amd64:stable/Dockerfile	X	2017,2018
+./contrib/docker/debian-amd64:unstable/Dockerfile	X	2017,2018
+./contrib/docker/debian-i386:oldstable/Dockerfile	X	2017,2018
+./contrib/docker/debian-i386:stable/Dockerfile	X	2017,2018
+./contrib/docker/debian-i386:unstable/Dockerfile	X	2017,2018
 ./contrib/docker/fedora-amd64:latest/Dockerfile	X	2017
-./contrib/docker/ubuntu-amd64:latest/Dockerfile	X	2017
-./contrib/docker/ubuntu-i386:latest/Dockerfile	X	2017
+./contrib/docker/ubuntu-amd64:latest/Dockerfile	X	2017,2018
+./contrib/docker/ubuntu-i386:latest/Dockerfile	X	2017,2018
 ./contrib/idn/README.idnkit			X	2005,2009
 ./contrib/idn/idnkit-1.0-src/.gitignore		X	2014
 ./contrib/idn/idnkit-1.0-src/ChangeLog		X	2003