diff --git a/assets/update_mirror_debian.sh b/assets/update_mirror_debian.sh
index c782725..1523fe3 100755
--- a/assets/update_mirror_debian.sh
+++ b/assets/update_mirror_debian.sh
@@ -8,7 +8,7 @@ set -e
 # include "deb http://security.debian.org jessie/updates main" in your sources.list
 # file or mirror it similarly as done below to keep up with security updates.
 
-DEBIAN_RELEASE=jessie
+DEBIAN_RELEASE=stretch
 UPSTREAM_URL="http://deb.debian.org/debian/"
 COMPONENTS=( main )
 REPOS=( ${DEBIAN_RELEASE} ${DEBIAN_RELEASE}-updates )
diff --git a/assets/update_mirror_ubuntu.sh b/assets/update_mirror_ubuntu.sh
index f2faa84..c2f49e2 100755
--- a/assets/update_mirror_ubuntu.sh
+++ b/assets/update_mirror_ubuntu.sh
@@ -10,7 +10,7 @@ set -e
 # For more detail about each of the variables below refer to: 
 # https://help.ubuntu.com/community/Repositories/CommandLine
 
-UBUNTU_RELEASE=trusty
+UBUNTU_RELEASE=bionic
 UPSTREAM_URL="http://archive.ubuntu.com/ubuntu/"
 COMPONENTS=( main universe )
 REPOS=( ${UBUNTU_RELEASE} ${UBUNTU_RELEASE}-updates ${UBUNTU_RELEASE}-security )