diff --git a/cf_gateway_rule_create.js b/cf_gateway_rule_create.js
index bf9e73d..d069a00 100644
--- a/cf_gateway_rule_create.js
+++ b/cf_gateway_rule_create.js
@@ -1,13 +1,11 @@
 import { createZeroTrustRule, getZeroTrustLists } from "./lib/api.js";
 
 const { result: lists } = await getZeroTrustLists();
-const wirefilterExpression = lists.reduce((previous, current, index) => {
+const wirefilterExpression = lists.reduce((previous, current) => {
   if (!current.name.startsWith("CGPS List")) return previous;
 
-  // Remove the trailing ' or '
-  if (index === lists.length - 1) return previous.slice(0, -4);
-
   return `${previous} any(dns.domains[*] in \$${current.id}) or `;
 }, "");
 
-await createZeroTrustRule(wirefilterExpression);
+// Remove the trailing ' or '
+await createZeroTrustRule(wirefilterExpression.slice(0, -4));