diff --git a/dvc/rwlock.py b/dvc/rwlock.py
index bad2df9495..d0665483c3 100644
--- a/dvc/rwlock.py
+++ b/dvc/rwlock.py
@@ -50,6 +50,9 @@ def _edit_rwlock(lock_dir):
     yield lock
     with open(path, "w+") as fobj:
         json.dump(lock, fobj)
+        # NOTE: flush and fsync to ensure that rwlock contents are saved
+        fobj.flush()
+        os.fsync(fobj.fileno())
 
 
 def _infos_to_str(infos):