diff --git a/buildserver/provision-apt-get-install b/buildserver/provision-apt-get-install
index 114101eb..d0b903e2 100644
--- a/buildserver/provision-apt-get-install
+++ b/buildserver/provision-apt-get-install
@@ -52,6 +52,9 @@ apt-get update || apt-get update
 apt-get upgrade --download-only
 apt-get upgrade
 
+# again after upgrade in case of keyring changes
+apt-get update || apt-get update
+
 packages="
  androguard/stretch-backports
  ant