diff --git a/hosts/containers/ticker/default.nix b/hosts/containers/ticker/default.nix
index e56b2b4a..145808a9 100644
--- a/hosts/containers/ticker/default.nix
+++ b/hosts/containers/ticker/default.nix
@@ -34,7 +34,7 @@ with lib;
       color = "#00007F";
     };
     gruenes-brett = {
-      url = "https://gruenesbrett.net/events.ics";
+      url = "https://dresden.gruenesbrett.net/ical/all/";
       color = "#00BF00";
     };
     stura-htw = {
@@ -69,10 +69,6 @@ with lib;
       url = "https://www.google.com/calendar/ical/bj85d742g31mgkblbaiusmk3s8%40group.calendar.google.com/public/basic.ics";
       color = "#DF003F";
     };
-    rosenwerk-extern = {
-      url = "https://www.google.com/calendar/ical/ogo94kraeq5ckmu3jsr0uus2mo%40group.calendar.google.com/private-8d048bfa99cca84705ffa675aacfe22a/basic.ics";
-      color = "#BF002F";
-    };
     rosenwerk-kultur = {
       url = "https://www.google.com/calendar/ical/93enn926ddhgr79hnqp83ipj3g%40group.calendar.google.com/public/basic.ics";
       color = "#BF001F";
@@ -113,10 +109,6 @@ with lib;
       url = "https://mobilizon.envs.net/@ffdd/feed/ics";
       color = "#AFAF00";
     };
-    astro = {
-      url = "https://mobilizon.c3d2.de/@astro/feed/ics";
-      color = "#333333";
-    };
     dhmd = {
       url = "https://scrape.hq.c3d2.de/dhmd-veranstaltungen.ics";
       color = "#E00728";
@@ -133,10 +125,6 @@ with lib;
       url = "https://www.meetup.com/de-DE/ddos-usergroup/events/ical/";
       color = "#001F3F";
     };
-    impfaktionen = {
-      url = "https://scrape.hq.c3d2.de/drk-impfaktionen.ics";
-      color = "#EF3FCF";
-    };
     diwo = {
       url = "https://pretix.eu/diwoweek/events/ical/?locale=de";
       color = "#723465";