diff --git a/apt-mirror.sh b/apt-mirror.sh
index dab0db6..3b5262c 100644
--- a/apt-mirror.sh
+++ b/apt-mirror.sh
@@ -3,16 +3,16 @@
 UBUNTU_VERSION=$(lsb_release -cs)
 
 tee -a sources.list << EOF
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION} main restricted
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION}-updates main restricted
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION} universe
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION}-updates universe
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION} multiverse
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION}-updates multiverse
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION}-backports main restricted universe multiverse
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION}-security main restricted
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION}-security universe
-deb http://apt.internal.cubetiqs.com/ubuntu ${UBUNTU_VERSION}-security multiverse
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION} main restricted
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION}-updates main restricted
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION} universe
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION}-updates universe
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION} multiverse
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION}-updates multiverse
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION}-backports main restricted universe multiverse
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION}-security main restricted
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION}-security universe
+deb https://mirror.ctdn.net/ubuntu ${UBUNTU_VERSION}-security multiverse
 EOF
 
 mv /etc/apt/sources.list /etc/apt/sources.list.bak