diff --git a/docusaurus.config.ts b/docusaurus.config.ts
index a101f9b53aae73bce5b6cb250558b2c55cc25326..8f5b9d15d67721721104d50eccaca17aa58c9717 100644
--- a/docusaurus.config.ts
+++ b/docusaurus.config.ts
@@ -149,11 +149,11 @@ const config: Config = {
           items: [
             {
               label: 'Zoom',
-              href: 'https://fz-juelich-de.zoom.us/j/63566578749?pwd=Vm0vSkFKd1FOYjNkV3ltekhWNTBodz09',
+              href: 'https://fz-juelich-de.zoom.us/j/64190088739?pwd=bS0O4mnE4TP8FV3TUr3foxYmN7TIDm.1',
             },
             {
               label: 'Slack',
-              href: 'https://join.slack.com/t/introtoscmay2024/shared_invite/zt-2inepuzqd-n9RNyjsNCjZABZJ3x6D_vg',
+              href: '',
             },
           ],
         },
@@ -174,7 +174,7 @@ const config: Config = {
             },
             {
               label: 'Attendance list',
-              href: 'https://gitlab.jsc.fz-juelich.de/hedgedoc/CP2OZecbRJ6pc3scRzAGoQ',
+              href: 'https://gitlab.jsc.fz-juelich.de/hedgedoc/bPd5FSZwQt6e68Fh5NEE4g',
             },
             {
               label: 'Past course materials',