diff --git a/dfdatetime/serializer.py b/dfdatetime/serializer.py
index 26f8d5f..94a1e3a 100644
--- a/dfdatetime/serializer.py
+++ b/dfdatetime/serializer.py
@@ -121,6 +121,7 @@ def ConvertJSONToDateTimeValues(cls, json_dict):
             "TimeElements",
             "TimeElementsInMilliseconds",
             "TimeElementsInMicroseconds",
+            "TimeElementsInNanoseconds",
         ):
             is_delta = json_dict.get("is_delta")
             if is_delta is not None:
diff --git a/tests/serializer.py b/tests/serializer.py
index 5025cd4..f14861f 100644
--- a/tests/serializer.py
+++ b/tests/serializer.py
@@ -222,6 +222,21 @@ def testConvertDateTimeValuesToJSON(self):
         )
         self.assertEqual(json_dict, expected_json_dict)
 
+        time_elements_object = time_elements.TimeElementsInNanoseconds(
+            time_elements_tuple=(2010, 8, 12, 20, 6, 31, 429876543)
+        )
+
+        expected_json_dict = {
+            "__class_name__": "TimeElementsInNanoseconds",
+            "__type__": "DateTimeValues",
+            "time_elements_tuple": (2010, 8, 12, 20, 6, 31, 429876543),
+        }
+
+        json_dict = serializer.Serializer.ConvertDateTimeValuesToJSON(
+            time_elements_object
+        )
+        self.assertEqual(json_dict, expected_json_dict)
+
     def testConvertJSONToDateTimeValues(self):
         """Test ConvertJSONToDateTimeValues function."""
         json_dict = {
@@ -382,6 +397,19 @@ def testConvertJSONToDateTimeValues(self):
         date_time_object = serializer.Serializer.ConvertJSONToDateTimeValues(json_dict)
         self.assertEqual(date_time_object, expected_date_time_object)
 
+        json_dict = {
+            "__class_name__": "TimeElementsInNanoseconds",
+            "__type__": "DateTimeValues",
+            "time_elements_tuple": (2010, 8, 12, 20, 6, 31, 429876543),
+        }
+
+        expected_date_time_object = time_elements.TimeElementsInNanoseconds(
+            time_elements_tuple=(2010, 8, 12, 20, 6, 31, 429876543)
+        )
+
+        date_time_object = serializer.Serializer.ConvertJSONToDateTimeValues(json_dict)
+        self.assertEqual(date_time_object, expected_date_time_object)
+
         # Test if is_delta is removed.
         json_dict = {
             "__class_name__": "PosixTime",