diff --git a/package.json b/package.json
index 65f6b82..93956f8 100644
--- a/package.json
+++ b/package.json
@@ -15,8 +15,8 @@
   },
   "description": "calmerger",
   "main": "server.js",
-  "type": "module",
   "author": "Ryan",
+  "type": "module",
   "license": "ISC",
   "devDependencies": {
     "@babel/preset-env": "^7.26.0",
diff --git a/src/lib/ical.js b/src/lib/ical.cjs
similarity index 100%
rename from src/lib/ical.js
rename to src/lib/ical.cjs
diff --git a/src/lib/ical.timezones.js b/src/lib/ical.timezones.js
index aebfa4a..3fcb1f7 100644
--- a/src/lib/ical.timezones.js
+++ b/src/lib/ical.timezones.js
@@ -1,4 +1,7 @@
-const ICAL = require('./ical.js');
+import { createRequire } from 'module';
+const require = createRequire(import.meta.url);
+
+const ICAL = require('./ical.cjs');
 (function() {
   function register(tzdata) { ICAL.TimezoneService.register(ICAL.Component.fromString("BEGIN:VTIMEZONE\r\n" + tzdata + "\r\nEND:VTIMEZONE")) };
   ICAL.TimezoneService.IANA_TZDB_VERSION = "2024b";