diff --git a/coretabs.user.js b/coretabs.user.js
index 2e6a2f7..01383e2 100644
--- a/coretabs.user.js
+++ b/coretabs.user.js
@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         CoreTabs
 // @namespace    https://git.diasbaskara.id/diasbaskara/userscripts/
-// @version      0.3
+// @version      0.3.1
 // @description  Manage your cases easily.
 // @author       Dias Baskara
 // @match        https://coretax.intranet.pajak.go.id/*
@@ -190,7 +190,7 @@
 
             actionsContainer.append(openBtn, docsBtn, usersBtn);
 
-            if (caseObject.CaseTypeName && e.CaseTypeName.startsWith(REFUND_CASE_PREFIX)) {
+            if (caseObject.CaseTypeName && caseObject.CaseTypeName.startsWith(REFUND_CASE_PREFIX)) {
                 const refundBtn = document.createElement('button');
                 refundBtn.className = 'action-btn review-refund-case';
                 refundBtn.textContent = 'Refund Review';