diff --git a/3.New_server_deployment/4.APT_upgrade/0_setup.sh b/3.New_server_deployment/4.APT_upgrade/0_setup.sh
index 4f18d3815ada13b5442e76fea094e185202396c2..510a8d5bab3ebc8775bd6f9337cee5c850394e31 100755
--- a/3.New_server_deployment/4.APT_upgrade/0_setup.sh
+++ b/3.New_server_deployment/4.APT_upgrade/0_setup.sh
@@ -26,7 +26,7 @@ fi
 if ( ! test -z ${APT_CACHE_URL} ); then
 	if ( ! grep "${APT_CACHE_URL}" /etc/apt/sources.list >/dev/null ); then
 		echo "Updating /etc/apt/sources.list to use cache ${APT_CACHE_URL}."
-		sed -i "s@http://@http://${APT_CACHE_URL}@" /etc/apt/sources.list
+		sed -i "s@http://@http://${APT_CACHE_URL}/@" /etc/apt/sources.list
 	fi
 fi