diff --git a/dhcp-lease-comment.capsman.rsc b/dhcp-lease-comment.capsman.rsc
index d3b2dc5..89d2c4e 100644
--- a/dhcp-lease-comment.capsman.rsc
+++ b/dhcp-lease-comment.capsman.rsc
@@ -15,6 +15,9 @@
 :while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
 
 :global LogPrintExit2;
+:global ScriptLock;
+
+$ScriptLock $0;
 
 :foreach Lease in=[ /ip/dhcp-server/lease/find where dynamic=yes status=bound ] do={
   :local LeaseVal [ /ip/dhcp-server/lease/get $Lease ];
diff --git a/dhcp-lease-comment.local.rsc b/dhcp-lease-comment.local.rsc
index 0d1b2c0..11e92cc 100644
--- a/dhcp-lease-comment.local.rsc
+++ b/dhcp-lease-comment.local.rsc
@@ -15,6 +15,9 @@
 :while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
 
 :global LogPrintExit2;
+:global ScriptLock;
+
+$ScriptLock $0;
 
 :foreach Lease in=[ /ip/dhcp-server/lease/find where dynamic=yes status=bound ] do={
   :local LeaseVal [ /ip/dhcp-server/lease/get $Lease ];
diff --git a/dhcp-lease-comment.template.rsc b/dhcp-lease-comment.template.rsc
index 28581f4..be28cfd 100644
--- a/dhcp-lease-comment.template.rsc
+++ b/dhcp-lease-comment.template.rsc
@@ -16,6 +16,9 @@
 :while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
 
 :global LogPrintExit2;
+:global ScriptLock;
+
+$ScriptLock $0;
 
 :foreach Lease in=[ /ip/dhcp-server/lease/find where dynamic=yes status=bound ] do={
   :local LeaseVal [ /ip/dhcp-server/lease/get $Lease ];