diff --git a/tuf/api/metadata.py b/tuf/api/metadata.py
index 61a306abaf..c4567af4f1 100644
--- a/tuf/api/metadata.py
+++ b/tuf/api/metadata.py
@@ -838,7 +838,7 @@ def __init__(
         self.unrecognized_fields = unrecognized_fields or {}
 
     @classmethod
-    def from_dict(cls, delegations_dict: Mapping[str, Any]) -> "Delegations":
+    def from_dict(cls, delegations_dict: Dict[str, Any]) -> "Delegations":
         """Creates Delegations object from its dict representation."""
         keys = delegations_dict.pop("keys")
         keys_res = {}