diff --git a/bzGraflow.js b/bzGraflow.js
index d4ed699..30c616b 100644
--- a/bzGraflow.js
+++ b/bzGraflow.js
@@ -10,6 +10,7 @@
  * This code is free to use and modify, 
  * as long as the copyright notice and license are kept.
  */
+const scriptUrl = document.currentScript.src
 
 class BZgraflow extends Buildoz{
     dirVect = {
@@ -39,7 +40,8 @@ class BZgraflow extends Buildoz{
     static async getCoreCss(){
         if(BZgraflow._coreCssPromise) return(await BZgraflow._coreCssPromise)
         BZgraflow._coreCssPromise = (async() => {
-            const res = await fetch('./buildoz.css')
+            const url = new URL('./buildoz.css', scriptUrl)
+            const res = await fetch(url)
             const css = await res.text()
             const m = css.match(/\/\*\s*BZGRAFLOW_CORE_START\s*\*\/([\s\S]*?)\/\*\s*BZGRAFLOW_CORE_END\s*\*\//)
             const core = m ? m[1] : ''