diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index b24a7937..7ab1a95b 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,8 @@
+Unreleased
+----------
+
+-  fix: :doc:`/scripts/csvstat` no longer errors when a column is a time delta and :code:`--json` is set.
+
 2.0.0 - May 1, 2024
 -------------------
 
diff --git a/csvkit/cli.py b/csvkit/cli.py
index a0d54c26..7d3554c4 100644
--- a/csvkit/cli.py
+++ b/csvkit/cli.py
@@ -444,6 +444,8 @@ def default_str_decimal(obj):
 
 
 def default_float_decimal(obj):
+    if isinstance(obj, datetime.timedelta):
+        return obj.total_seconds()
     if isinstance(obj, decimal.Decimal):
         return float(obj)
     return default_str_decimal(obj)