diff --git a/src/datumaro/plugins/transforms.py b/src/datumaro/plugins/transforms.py
index 2d8707fd32..3a22ffb36e 100644
--- a/src/datumaro/plugins/transforms.py
+++ b/src/datumaro/plugins/transforms.py
@@ -661,7 +661,9 @@ def __init__(self, extractor, ensure_unique: bool = False, suffix_length: int =
     def _add_unique_suffix(self, name):
         count = 0
         while name in self._names:
-            suffix = "".join(random.choices(self.SUFFIX_LETTERS, k=self._suffix_length))
+            suffix = "".join(
+                random.choices(self.SUFFIX_LETTERS, k=self._suffix_length)
+            )  # nosec B311
             new_name = f"{name}__{suffix}"
             if new_name not in self._names:
                 name = new_name