diff --git a/app/scodoc/sco_archives.py b/app/scodoc/sco_archives.py
index 55d7b0685..e63ef32bd 100644
--- a/app/scodoc/sco_archives.py
+++ b/app/scodoc/sco_archives.py
@@ -224,7 +224,7 @@ class BaseArchiver(object):
         archive_id = (
             self.get_obj_dir(oid)
             + os.path.sep
-            + "-".join(["{x:02d}" for x in time.localtime()[:6]])
+            + "-".join([f"{x:02d}" for x in time.localtime()[:6]])
         )
         log(f"creating archive: {archive_id}")
         try:
diff --git a/sco_version.py b/sco_version.py
index 8a656e714..e5f606a74 100644
--- a/sco_version.py
+++ b/sco_version.py
@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 # -*- coding: utf-8 -*-
 
-SCOVERSION = "9.4.66"
+SCOVERSION = "9.4.67"
 
 SCONAME = "ScoDoc"