diff --git a/software/backupserver/software.cfg b/software/backupserver/software.cfg
index 0550b514ff18e5f0a8d2a09fc8a1370847345b37..e96f29f8a9f5d75ec38d3834c82bab0648a4df44 100644
--- a/software/backupserver/software.cfg
+++ b/software/backupserver/software.cfg
@@ -246,6 +246,7 @@ output = ${buildout:directory}/template.cfg
 mode = 0644
 
 [versions]
+zc.buildout = 1.6.0-dev-SlapOS-010
 rdiff-backup = 1.0.5
 Jinja2 = 2.7
 MarkupSafe = 0.18