diff --git a/hosts/monitoring/configuration.nix b/hosts/monitoring/configuration.nix
index c9e120a..74b761a 100644
--- a/hosts/monitoring/configuration.nix
+++ b/hosts/monitoring/configuration.nix
@@ -74,6 +74,7 @@ with lib;
   };
   services.prometheus = {
     enable = true;
+    retentionTime = "90d";
     listenAddress = "[::1]";
     scrapeConfigs = [
       {
@@ -314,25 +315,16 @@ with lib;
     enable = true;
     virtualHosts = {
       "prometheus.bula22.de" = {
-        serverAliases = [
-          "prometheus"
-        ];
         enableACME = true;
         forceSSL   = true;
         locations."/".proxyPass = "http://[::1]:9090/";
       };
       "grafana.bula22.de" = {
-        serverAliases = [
-          "grafana"
-        ];
         enableACME = true;
         forceSSL   = true;
         locations."/".proxyPass = "http://[::1]:3001/";
       };
       "influxdb.bula22.de" = {
-        serverAliases = [
-          "influxdb"
-        ];
         enableACME = true;
         forceSSL   = true;
         locations."/".proxyPass = "http://[::1]:8086/";