diff --git a/flake.lock b/flake.lock
index 152a62e..4c3eae3 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1625601352,
-        "narHash": "sha256-yCvbAC+gadcmW94KvXbTLWC5erkcKClQWX3G8k5O7u0=",
+        "lastModified": 1625919529,
+        "narHash": "sha256-Epn7JRegnKN81hQh4hGx1FOwfp3fBxDCIuSZDgqaBQ4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9d1350d9d56411b685ff3de5839ed6728b1bf808",
+        "rev": "cf59fbd539681f5ec2f4a82cf77aae7ab827a03f",
         "type": "github"
       },
       "original": {
@@ -23,11 +23,11 @@
     },
     "unstable": {
       "locked": {
-        "lastModified": 1625533413,
-        "narHash": "sha256-D4Dp2qDmY3Y9/Mqxsha/18F0RsH3hPiHafG4bvTz2V4=",
+        "lastModified": 1625874246,
+        "narHash": "sha256-7cGgcysIXz/j/lRpJn7cNJjf0+k7sQ5EuGn62252Svw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "036dc0c709650e0c833822307af801f576d67273",
+        "rev": "45fc7d4a35c5343e58541a7847f6415654ccbb37",
         "type": "github"
       },
       "original": {
diff --git a/modules/phpipam.nix b/modules/phpipam.nix
index 8e0b5fb..2b17a54 100644
--- a/modules/phpipam.nix
+++ b/modules/phpipam.nix
@@ -21,6 +21,12 @@ let
     '';
   };
 
+  cronScripts = {
+    phpipam_ping = "exec ${pkgs.php}/bin/php ${phpipamHtdocs}/functions/scripts/pingCheck.php";
+    phpipam_remove_offline = "exec ${pkgs.php}/bin/php ${phpipamHtdocs}/functions/scripts/remove_offline_addresses.php";
+    phpipam_discovery = "exec ${pkgs.php}/bin/php ${phpipamHtdocs}/functions/scripts/discoveryCheck.php";
+  };
+
 in
 {
   options.sconfig.phpipam = {
@@ -51,20 +57,18 @@ in
 
   config = lib.mkIf cfg.enable {
 
-    systemd.services = {
-      phpipam_ping = {
-        script = "exec ${pkgs.php}/bin/php ${phpipamHtdocs}/functions/scripts/pingCheck.php";
+    systemd.services = builtins.mapAttrs
+      (_: script: {
+        inherit script;
         environment.IPAM_DATABASE_USER = "nginx";
         serviceConfig.User = "nginx";
         startAt = "*:0/15";
-      };
-      phpipam_discovery = {
-        script = "exec ${pkgs.php}/bin/php ${phpipamHtdocs}/functions/scripts/discoveryCheck.php";
-        environment.IPAM_DATABASE_USER = "nginx";
-        serviceConfig.User = "nginx";
-        startAt = "*:0/15";
-      };
-    };
+      })
+      cronScripts;
+
+    systemd.timers = builtins.mapAttrs
+      (_: _: { timerConfig.RandomizedDelaySec = 600; })
+      cronScripts;
 
     services = {