diff --git a/server/app/rest_api/rest.py b/server/app/rest_api/rest.py
index 32342e18..f6c60e98 100644
--- a/server/app/rest_api/rest.py
+++ b/server/app/rest_api/rest.py
@@ -221,7 +221,7 @@ def is_safe_collection_name(name):
     """
     if name is None:
         return False
-    return re.match(r"^\w+$", name) is not None
+    return re.match(r"^[\w\-]+$", name) is not None
 
 
 def get_api_resources():
diff --git a/server/app/scanpy_engine/labels.py b/server/app/scanpy_engine/labels.py
index 1cdaeb42..7946f12e 100644
--- a/server/app/scanpy_engine/labels.py
+++ b/server/app/scanpy_engine/labels.py
@@ -17,7 +17,6 @@ def read_labels(fname):
 def write_labels(fname, df, header=None, backup_dir=None):
     if backup_dir is not None:
         backup(fname, backup_dir)
-        # rotate_fname(fname, backup_dir)
     if not df.empty:
         with open(fname, "w", newline="") as f:
             if header is not None: