diff --git a/aisploit/core/target.py b/aisploit/core/target.py
index bb6e96a..386a079 100644
--- a/aisploit/core/target.py
+++ b/aisploit/core/target.py
@@ -1,19 +1,18 @@
+from typing import Dict, Any
 from abc import ABC, abstractmethod
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 
 from .prompt import BasePromptValue
 
 
-@dataclass(frozen=True)
+@dataclass
 class Response:
-    """A class representing a response from a target.
-
-    Attributes:
-        content (str): The content of the response.
-    """
+    """A class representing a response from the target."""
 
     content: str
 
+    metadata: Dict[str, Any] = field(default_factory=dict)
+
     def __repr__(self) -> str:
         """Return a string representation of the Response."""
         return f"content={repr(self.content)}"