diff --git a/modules/periodic.nix b/modules/periodic.nix
index 82a8844..af50bf4 100644
--- a/modules/periodic.nix
+++ b/modules/periodic.nix
@@ -120,4 +120,14 @@ in {
     startAt = "14:00:00";
     after = [ "network-online.target" ];
   };
+
+  # Clean up Mopidy cache monthly
+  systemd.services.mopidy-cleanup = {
+    description = "Clean up Mopidy cache monthly";
+    path = [ coreutils ];
+    script = "${pkgs.coreutils}/bin/rm -rf /var/lib/mopidy/.cache/*";
+    serviceConfig.Type = "oneshot";
+    startAt = "*-*-15 14:00:00";
+    after = [ "network-online.target" ];
+  };
 }