diff --git a/hosts/marvin/services/library.nix b/hosts/marvin/services/library.nix
index a4c6dc85..f686d2b1 100644
--- a/hosts/marvin/services/library.nix
+++ b/hosts/marvin/services/library.nix
@@ -28,12 +28,17 @@ let
 in
 {
   systemd = {
+    slices.system-grimmory = {
+      description = "Grimmory Ebook Manager System Slice";
+      documentation = [ "https://grimmory.org" ];
+    };
     services = {
       grimmory-db-proxy = {
         description = "Grimmory DB Proxy";
         wantedBy = [ "grimmory.service" ];
         after = [ "mysql.service" ];
         serviceConfig = {
+          Slice = "system-grimmory.slice";
           User = "booklore";
           Group = "booklore";
           ExecStart = "${lib.getExe pkgs.socat} tcp-l:3307,reuseaddr,fork unix:/run/mysqld/mysqld.sock";
@@ -80,6 +85,7 @@ in
         };
 
         serviceConfig = {
+          Slice = "system-grimmory.slice";
           User = "booklore";
           Group = "booklore";
           StateDirectory = "booklore";