diff --git a/COPYING b/COPYING
index 88798ab..28ecdc8 120000
--- a/COPYING
+++ b/COPYING
@@ -1 +1 @@
-/usr/share/automake-1.15/COPYING
\ No newline at end of file
+/usr/share/automake-1.16/COPYING
\ No newline at end of file
diff --git a/INSTALL b/INSTALL
index ddcdb76..e3f22c0 120000
--- a/INSTALL
+++ b/INSTALL
@@ -1 +1 @@
-/usr/share/automake-1.15/INSTALL
\ No newline at end of file
+/usr/share/automake-1.16/INSTALL
\ No newline at end of file
diff --git a/build-in-docker.sh b/build-in-docker.sh
index c59ce76..383853d 100755
--- a/build-in-docker.sh
+++ b/build-in-docker.sh
@@ -264,7 +264,7 @@ case "$mode" in
             docker exec ${DOCKER_ID} apt-get install ${OPTIONS} ${PREVENT// /- }- software-properties-common apt-transport-https dpkg-dev lsb-release wget || \
             docker exec ${DOCKER_ID} apt-get install ${OPTIONS} ${PREVENT// /- }- python-software-properties apt-transport-https dpkg-dev lsb-release wget;
         if [[ "${img}" =~ "ubuntu" ]]; then
-            docker exec ${DOCKER_ID} apt-get install ${OPTIONS} locales
+            docker exec ${DOCKER_ID} apt-get install ${OPTIONS} locales gnupg
             docker exec ${DOCKER_ID} locale-gen ${LANG}
             docker exec ${DOCKER_ID} update-locale LANG=${LANG}
         fi