diff --git a/changedetectionio/flask_app.py b/changedetectionio/flask_app.py
index 7d0c9d5c..ae611caa 100644
--- a/changedetectionio/flask_app.py
+++ b/changedetectionio/flask_app.py
@@ -43,6 +43,7 @@ from loguru import logger
 from changedetectionio import html_tools, __version__
 from changedetectionio import queuedWatchMetaData
 from changedetectionio.api import api_v1
+from .store import CustomEncoder
 from .time_handler import is_within_schedule
 
 datastore = None
@@ -1613,7 +1614,7 @@ def changedetection_app(config=None, datastore_o=None):
         watch['ignore_text'] += datastore.data['settings']['application']['global_ignore_text']
         watch['subtractive_selectors'] += datastore.data['settings']['application']['global_subtractive_selectors']
 
-        watch_json = json.dumps(watch)
+        watch_json = json.dumps(watch, cls=CustomEncoder)
 
         try:
             r = requests.request(method="POST",
diff --git a/changedetectionio/store.py b/changedetectionio/store.py
index 89a08648..38571f65 100644
--- a/changedetectionio/store.py
+++ b/changedetectionio/store.py
@@ -6,7 +6,7 @@ from flask import (
 
 from .html_tools import TRANSLATE_WHITESPACE_TABLE
 from .model import App, Watch, WatchBase
-from copy import deepcopy, copy
+from copy import deepcopy
 from os import path, unlink
 from threading import Lock
 import json