diff --git a/infinitepush/backupcommands.py b/infinitepush/backupcommands.py
--- a/infinitepush/backupcommands.py
+++ b/infinitepush/backupcommands.py
@@ -838,7 +838,7 @@
     return backupstate()
 
 def _writelocalbackupstate(vfs, heads, bookmarks):
-    with vfs(_backupstatefile, 'w') as f:
+    with vfs(_backupstatefile, 'w', atomictemp=True) as f:
         f.write(json.dumps({'heads': list(heads), 'bookmarks': bookmarks}))
 
 def _readbackupgenerationfile(vfs):