diff --git a/doc/newsfragments/3178_changed.orjson_opt.rst b/doc/newsfragments/3178_changed.orjson_opt.rst
new file mode 100644
index 000000000..7e8e98fd9
--- /dev/null
+++ b/doc/newsfragments/3178_changed.orjson_opt.rst
@@ -0,0 +1 @@
+Update ``orjson`` dumping option to allow serializing ``numpy`` objects.
\ No newline at end of file
diff --git a/testplan/common/utils/json.py b/testplan/common/utils/json.py
index f18df7c96..e5202d1ce 100644
--- a/testplan/common/utils/json.py
+++ b/testplan/common/utils/json.py
@@ -24,7 +24,8 @@ def json_dumps(data, indent_2=False, default=None) -> str:
         return orjson.dumps(
             data,
             default=default,
-            option=orjson.OPT_INDENT_2 if indent_2 else 0,
+            option=(orjson.OPT_INDENT_2 if indent_2 else 0)
+            | orjson.OPT_SERIALIZE_NUMPY,
         ).decode()
     else:
         if default: