diff --git a/lib/obs.py b/lib/obs.py
index 94aae4f..c4558cf 100644
--- a/lib/obs.py
+++ b/lib/obs.py
@@ -1,5 +1,6 @@
 import errno
 import logging
+import os
 import shutil
 import time
 import urllib.parse
@@ -169,11 +170,12 @@ class OBS:
             with (dirpath / name).open("wb") as f:
                 f.write(self._download(project, package, name, revision).read())
 
-            shutil.copy(dirpath / name, cached_file)
-
             # Validate the MD5 of the downloaded file
-            if md5(cached_file) != file_md5:
+            if md5(dirpath / name) != file_md5:
                 raise Exception(f"Download error in {name}")
+
+            shutil.copy(dirpath / name, cached_file.with_suffix(".new"))
+            os.rename(cached_file.with_suffix(".new"), cached_file)
         else:
             shutil.copy(cached_file, dirpath / name)