diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index fabe3c8d8..c84e9d28d 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -539,7 +539,7 @@ class Image:
         self._mode: str = ""
         self._size: tuple[int, int] = (0, 0)
         self.palette = None
-        self.info = {}
+        self.info: dict[Any, Any] = {}
         self.readonly: int = 0
         self._exif: Exif | None = None
 
diff --git a/src/PIL/PngImagePlugin.py b/src/PIL/PngImagePlugin.py
index 910fa9755..473594dde 100644
--- a/src/PIL/PngImagePlugin.py
+++ b/src/PIL/PngImagePlugin.py
@@ -863,6 +863,7 @@ class PngImageFile(ImageFile.ImageFile):
         assert self.png is not None
 
         self.dispose: _imaging.ImagingCore | None
+        self.dispose_extent: tuple[int, int, int, int]
         if frame == 0:
             if rewind:
                 self._fp.seek(self.__rewind)
@@ -877,7 +878,7 @@ class PngImageFile(ImageFile.ImageFile):
             self.default_image = self.info.get("default_image", False)
             self.dispose_op = self.info.get("disposal")
             self.blend_op = self.info.get("blend")
-            self.dispose_extent = self.info.get("bbox")
+            self.dispose_extent = cast(tuple[int, int, int, int], self.info.get("bbox"))
             self.__frame = 0
         else:
             if frame != self.__frame + 1:
@@ -935,7 +936,7 @@ class PngImageFile(ImageFile.ImageFile):
             self.tile = self.png.im_tile
             self.dispose_op = self.info.get("disposal")
             self.blend_op = self.info.get("blend")
-            self.dispose_extent = self.info.get("bbox")
+            self.dispose_extent = cast(tuple[int, int, int, int], self.info.get("bbox"))
 
             if not self.tile:
                 msg = "image not found in APNG frame"