diff --git a/sp-modules/jitsi-meet/module.nix b/sp-modules/jitsi-meet/module.nix
index 2954226..09c6699 100644
--- a/sp-modules/jitsi-meet/module.nix
+++ b/sp-modules/jitsi-meet/module.nix
@@ -42,11 +42,11 @@ in
     };
     systemd = {
       services = {
-        jicofo.serviceConfig.Slice = "jitsi-meet.slice";
-        jitsi-videobridge2.serviceConfig.Slice = "jitsi-meet.slice";
-        prosody.serviceConfig.Slice = "jitsi-meet.slice";
+        jicofo.serviceConfig.Slice = "jitsi_meet.slice";
+        jitsi-videobridge2.serviceConfig.Slice = "jitsi_meet.slice";
+        prosody.serviceConfig.Slice = "jitsi_meet.slice";
       };
-      slices.jitsi-meet = {
+      slices.jitsi_meet = {
         description = "Jitsi Meet service slice";
       };
     };
diff --git a/sp-modules/simple-nixos-mailserver/config.nix b/sp-modules/simple-nixos-mailserver/config.nix
index 87a3ad5..a969f36 100644
--- a/sp-modules/simple-nixos-mailserver/config.nix
+++ b/sp-modules/simple-nixos-mailserver/config.nix
@@ -92,14 +92,14 @@ lib.mkIf sp.modules.simple-nixos-mailserver.enable
 
   systemd = {
     services = {
-      dovecot2.serviceConfig.Slice = "simple-nixos-mailserver.slice";
-      postfix.serviceConfig.Slice = "simple-nixos-mailserver.slice";
-      rspamd.serviceConfig.Slice = "simple-nixos-mailserver.slice";
-      redis-rspamd.serviceConfig.Slice = "simple-nixos-mailserver.slice";
-      opendkim.serviceConfig.Slice = "simple-nixos-mailserver.slice";
+      dovecot2.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+      postfix.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+      rspamd.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+      redis-rspamd.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+      opendkim.serviceConfig.Slice = "simple_nixos_mailserver.slice";
     };
-    slices."simple-nixos-mailserver" = {
-      name = "simple-nixos-mailserver.slice";
+    slices."simple_nixos_mailserver" = {
+      name = "simple_nixos_mailserver.slice";
       description = "Simple NixOS Mailserver service slice";
     };
   };