diff --git a/source/conf.py b/source/conf.py
index 78ff1fc..5ad4bcd 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -137,7 +137,7 @@ html_theme_options = {
         ('solid', 'podcast', 'podcasts', 'https://kreskenn.nerv-project.eu/channels/kujiulabs/', True),
         ('solid', 'paragraph', 'gemini', 'gemini://kujiu.eu', False),
         ('solid', 'rss', 'rss', 'https://kujiu.eu/blog/atom.xml', False),
-        ('solid', 'envelope', 'newsletter', 'https://e8eb781a.sibforms.com/serve/MUIEAJvJnY3tRS7Nh4RvCneup4b6zYrTqGw3TUsq3igy7_QACEbhSd8G26qTXES6uJS-fGtcGBaji0Os0eWK2CY2it80LrbbXL7WRdNibWlpKtLD2sv43rRROQxdBktxF0qci_7hXvkRuAKLRk_X3NtNCkRUV2prn0BHb4g4tr8vck_yic-nw_ZQlmAPWSrFd1FwGBGTqf1M_Frm', False),
+        ('solid', 'envelope', 'newsletter', 'https://sybil.nerv-project.eu/mailman3/lists/kujiulabs.sybil.nerv-project.eu/', False),
     ],
     'external_languages': [
         # ('code', 'name', 'baseurl'),
@@ -150,8 +150,8 @@ html_theme_options = {
         'id': 'JKNYR',
     },
     'isso': {
-        'prefix': '/isso/kujiu',
-        'url': baseurl + '/isso/kujiu',
+        'prefix': '',
+        'url': 'https://chicard.kujiu.eu',
         'require_author': "true",
         'reply_to_self': "true",
         'require_author': "true",