diff --git a/bootstrap.sh b/bootstrap.sh
index f62565f..82f7886 100644
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -21,6 +21,9 @@ fi
 
 echo "*** START ***"
 
+echo "## cleaning sources.list"
+sed -i '1,2d' /etc/apt/sources.list
+
 DEBIAN_FRONTEND=noninteractive
 export DEBIAN_FRONTEND