diff --git a/litellm/caching/in_memory_cache.py b/litellm/caching/in_memory_cache.py
index 2aa2b868600..ca3d3546d72 100644
--- a/litellm/caching/in_memory_cache.py
+++ b/litellm/caching/in_memory_cache.py
@@ -15,7 +15,7 @@ import sys
 import threading
 import time
 from collections.abc import Callable
-from typing import TYPE_CHECKING, Any, Final
+from typing import TYPE_CHECKING, Any, Final, TypeVar, cast
 
 if TYPE_CHECKING:
     from litellm.types.caching import RedisPipelineIncrementOperation
@@ -27,6 +27,7 @@ from litellm.constants import MAX_SIZE_PER_ITEM_IN_MEMORY_CACHE_IN_KB
 from .base_cache import BaseCache
 
 DEFAULT_MAX_SIZE_IN_MEMORY: Final = 200
+_T = TypeVar("_T")
 
 
 class InMemoryCache(BaseCache):
@@ -210,7 +211,7 @@ class InMemoryCache(BaseCache):
         return False
 
     @staticmethod
-    def _copy_cached_value(value: object) -> object:
+    def _copy_cached_value(value: _T) -> _T:
         """Return a read-isolated value without making the cache brittle.
 
         In-memory cache entries can contain Pydantic models and mutable
@@ -223,11 +224,11 @@ class InMemoryCache(BaseCache):
         if not isinstance(value, (dict, list, set, tuple, frozenset, bytearray, BaseModel)):
             return value
         try:
-            return copy.deepcopy(value)
+            return cast(_T, copy.deepcopy(value))
         except Exception:  # noqa: BLE001 - cache reads must tolerate non-copyable values
             return value
 
-    def _get_cache_value(self, key, *, copy_value: bool) -> object:
+    def _get_cache_value(self, key, *, copy_value: bool):
         if key in self.cache_dict:
             if self.evict_element_if_expired(key):
                 return None