diff --git a/js/mzta-utils.js b/js/mzta-utils.js
index 19633318..900e55b4 100644
--- a/js/mzta-utils.js
+++ b/js/mzta-utils.js
@@ -412,7 +412,7 @@ export async function checkSparksPresence() {
 }
 
 export function validateChatGPTWebCustomData(data) {
-  return data.startsWith('/g/') || data == '';
+  return /^\/g\/[a-zA-Z0-9-]+$/.test(data) || data == '';
 }
 
 export function sanitizeChatGPTModelData(input) {