diff --git a/systems/catullus/configuration.nix b/systems/catullus/configuration.nix
index f56117f..de2c385 100644
--- a/systems/catullus/configuration.nix
+++ b/systems/catullus/configuration.nix
@@ -123,7 +123,7 @@ in {
       krebs.urlwatch = {
         enable = true;
         onCalendar = "*-*-* 05:00:00";
-        customSendmail.enable = false;
+        sendmail.enable = false;
         telegram = {
           enable = true;
           chatId = [ "18980945" ];
@@ -132,7 +132,7 @@ in {
         urls = [
           # https://www.refrat.de/wahlen/2020/index.html
           "https://www.refrat.de/wahlen/"
-          "https://www.klassphil.hu-berlin.de/de"
+          "https://www.berlinerfestspiele.de/de/treffen-junger-autorinnen/service/publikationen/publikationen.html"
         ];
       };
     }
diff --git a/systems/homeros/configuration.nix b/systems/homeros/configuration.nix
index 3013c4f..e90501d 100644
--- a/systems/homeros/configuration.nix
+++ b/systems/homeros/configuration.nix
@@ -31,5 +31,5 @@
 
   networking.hostName = "homeros";
 
-  system.stateVersion = "19.09";
+  system.stateVersion = "18.09";
 }
diff --git a/systems/scardanelli/configuration.nix b/systems/scardanelli/configuration.nix
index 27bca39..8e563a6 100644
--- a/systems/scardanelli/configuration.nix
+++ b/systems/scardanelli/configuration.nix
@@ -27,5 +27,5 @@ in {
 
   networking.hostName = "scardanelli";
 
-  system.stateVersion = "19.03";
+  system.stateVersion = "18.09";
 }
diff --git a/systems/wilde/configuration.nix b/systems/wilde/configuration.nix
index ccd0de8..5e90c5d 100644
--- a/systems/wilde/configuration.nix
+++ b/systems/wilde/configuration.nix
@@ -36,5 +36,5 @@
 
   networking.hostName = "wilde";
 
-  system.stateVersion = "19.09";
+  system.stateVersion = "19.03";
 }