diff --git a/unstructured/metrics/object_detection.py b/unstructured/metrics/object_detection.py
index 7c28721518..3c77f3c7c0 100644
--- a/unstructured/metrics/object_detection.py
+++ b/unstructured/metrics/object_detection.py
@@ -232,11 +232,8 @@ def _parse_page_dimensions(data: dict) -> tuple[list, list]:
         """
         Process the page dimensions from the json file to the required format.
         """
-        pages_height = []
-        pages_width = []
-        for page in data["pages"]:
-            pages_height.append(page["size"]["height"])
-            pages_width.append(page["size"]["width"])
+        pages_height = [page["size"]["height"] for page in data["pages"]]
+        pages_width = [page["size"]["width"] for page in data["pages"]]
         return pages_height, pages_width
 
     @staticmethod