diff --git a/calcipy/check_for_stale_packages/_check_for_stale_packages.py b/calcipy/check_for_stale_packages/_check_for_stale_packages.py
index a17cd8f3..7d4672b5 100644
--- a/calcipy/check_for_stale_packages/_check_for_stale_packages.py
+++ b/calcipy/check_for_stale_packages/_check_for_stale_packages.py
@@ -213,7 +213,8 @@ def format_package(pack: _HostedPythonPackage) -> str:
         logger.warning('Found stale packages that may be a dependency risk', stale_list=stale_list)
         return True
     if packages:
-        oldest_date = np.amin([pack.datetime for pack in packages])  # pyright: ignore[reportGeneralTypeIssues]
+        datetime_array = np.asarray([pack.datetime for pack in packages])
+        oldest_date = np.amin(datetime_array)
         logger.text('No stale packages found', oldest=oldest_date.humanize(), stale_threshold=stale_months)
     return False