diff --git a/tna_utilities/security.py b/tna_utilities/security.py
index 4cc3d0e..e862577 100644
--- a/tna_utilities/security.py
+++ b/tna_utilities/security.py
@@ -30,9 +30,9 @@ class CspGenerator:
     def __init__(
         self,
         default_src: str | list[str] | None = None,
-        allow_objects=False,
-        allow_iframe_embedding=False,
-        allow_children=False,
+        allow_objects: bool = False,
+        allow_iframe_embedding: bool = False,
+        allow_children: bool = False,
     ) -> None:
         self.default_src_sources: list[str] = []
         if default_src: