diff --git a/monai/data/wsi_reader.py b/monai/data/wsi_reader.py
index d7cfb444e3b..be121efa403 100644
--- a/monai/data/wsi_reader.py
+++ b/monai/data/wsi_reader.py
@@ -763,7 +763,7 @@ def get_mpp(self, wsi, level: int) -> tuple[float, float]:
 
         raise ValueError("`mpp` cannot be obtained for this file. Please use `level` instead.")
 
-    def get_wsi_at_mpp(self, wsi, mpp: tuple, atol: float = 0.00, rtol: float = 0.05) -> np.ndarray:
+    def get_wsi_at_mpp(self, wsi, mpp: tuple, atol: float = 0.00, rtol: float = 0.05) -> Any:
         """
         Returns the representation of the whole slide image at a given micro-per-pixel (mpp) resolution.
         The optional tolerance parameters are considered at the level whose mpp value is closest to the one provided by the user.
@@ -1311,7 +1311,7 @@ def get_mpp(self, wsi, level: int) -> tuple[float, float]:
 
         raise ValueError("`mpp`  cannot be obtained for this file. Please use `level` instead.")
 
-    def get_wsi_at_mpp(self, wsi, mpp: tuple, atol: float = 0.00, rtol: float = 0.05) -> np.array:
+    def get_wsi_at_mpp(self, wsi, mpp: tuple, atol: float = 0.00, rtol: float = 0.05) -> np.ndarray:
         """
         Returns the representation of the whole slide image at a given micro-per-pixel (mpp) resolution.
         The optional tolerance parameters are considered at the level whose mpp value is closest to the one provided by the user.