diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 79dca36df..7216302b6 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,7 +1,7 @@
 Unreleased
 ----------
 
-* :doc:`/scripts/in2csv` adds a :code:`--reset-dimensions` option to `recalculate <https://openpyxl.readthedocs.io/en/stable/optimized.html#worksheet-dimensions>`_ the dimensions of an XLSX file, instead of trusting the file's metadata.
+* :doc:`/scripts/in2csv` adds a :code:`--reset-dimensions` option to `recalculate <https://openpyxl.readthedocs.io/en/stable/optimized.html#worksheet-dimensions>`_ the dimensions of an XLSX file, instead of trusting the file's metadata. csvkit's dependency `agate-excel <https://agate-excel.readthedocs.io/en/latest/>`_ 0.4.0 automatically recalculates the dimensions if the file's metadata expresses dimensions of "A1:A1" (a single cell).
 
 1.3.0 - October 18, 2023
 ------------------------
diff --git a/csvkit/utilities/in2csv.py b/csvkit/utilities/in2csv.py
index e826acfea..9ee188e18 100644
--- a/csvkit/utilities/in2csv.py
+++ b/csvkit/utilities/in2csv.py
@@ -50,7 +50,7 @@ def add_arguments(self):
             '--use-sheet-names', dest='use_sheet_names', action='store_true',
             help='Use the sheet names as file names when --write-sheets is set.')
         self.argparser.add_argument(
-            '--reset-dimensions', dest='reset_dimensions', action='store_true',
+            '--reset-dimensions', dest='reset_dimensions', action='store_true', default=None,
             help='Ignore the sheet dimensions provided by the XLSX file.')
         self.argparser.add_argument(
             '--encoding-xls', dest='encoding_xls',