diff --git a/CHIP-updater/jessie-to-stretch.sh b/CHIP-updater/jessie-to-stretch.sh
index 4a00f7d..b58f0ac 100644
--- a/CHIP-updater/jessie-to-stretch.sh
+++ b/CHIP-updater/jessie-to-stretch.sh
@@ -15,6 +15,7 @@ echo -e "deb http://chip.jfpossibilities.com/chip/debian/pocketchip jessie main"
 
 echo "."
 echo "*** Installing debian keyring. ***"
+apt-get update
 apt-get install debian-keyring debian-archive-keyring -y --force-yes
 sleep 5