diff --git a/helpers/config b/helpers/config
index c0f75e3..0d62157 100755
--- a/helpers/config
+++ b/helpers/config
@@ -120,13 +120,13 @@ EOF
 
 # manage external repository sources. If origin is ubuntu or debian, add updates and security repositories too
 if [ "1$EXTERNAL" != "1" ]; then
- if eval echo "$EXTERNAL" | grep "archive.ubuntu.com" | grep -qv -e updates -e security -e backports; then
+ if eval echo "$EXTERNAL" | grep "archive.ubuntu.com" | grep -qv -e updates -e security -e backports -e proposed; then
    RELNAME=$(eval echo "$EXTERNAL" | cut -d' ' -f 3)
    COMPONENTS=$(eval echo "$EXTERNAL" | cut -d' ' -f 4-)
    echo "deb-src http://archive.ubuntu.com/ubuntu/ $RELNAME $COMPONENTS" > ${LOCAL_APT}/etc/apt/sources.list
    echo "deb-src http://archive.ubuntu.com/ubuntu/ ${RELNAME}-updates $COMPONENTS" >> ${LOCAL_APT}/etc/apt/sources.list
    echo "deb-src http://archive.ubuntu.com/ubuntu/ ${RELNAME}-security $COMPONENTS" >> ${LOCAL_APT}/etc/apt/sources.list
- elif eval echo "$EXTERNAL" | grep "ftp.debian.org" |grep -qv -e updates -e security -e backports -e testing -e sid -e unstable -e experimental ; then
+ elif eval echo "$EXTERNAL" | grep "ftp.debian.org" |grep -qv -e updates -e security -e backports -e testing -e sid -e unstable -e experimental -e proposed ; then
    RELNAME=$(eval echo "$EXTERNAL" | cut -d' ' -f 3)
    COMPONENTS=$(eval echo "$EXTERNAL" | cut -d' ' -f 4-)
    echo "deb-src http://deb.debian.org/debian $RELNAME $COMPONENTS" > ${LOCAL_APT}/etc/apt/sources.list