1 files changed, 1 insertions, 1 deletions

diff --git a/subcmds/sync.py b/subcmds/sync.py
index a0a0be9a..02c1d3ae 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -1394,7 +1394,7 @@ later is required to fix a server side protocol bug.
 
             if username and password:
                 manifest_server = manifest_server.replace(
-                    "://", "://%s:%s@" % (username, password), 1
+                    "://", f"://{username}:{password}@", 1
                 )
 
         transport = PersistentTransport(manifest_server)